1 - In the discharge tube in which direction cathode rays travel?
Perpendicular to surface of cathode
2 - 6th period contains how many elements?
32
3 - The concept of Triads was presented by?
Dobareiner
4 - Resonating structure can not be?
Separated
5 - Which technique is used distinguish between imitation and pure diamond?
X-Ray
6 - Hemiacetal is formed when formaldehyde adds one molecule of?
Ethyl Alcohol
7 - Free neutron decays into?
Electron, Proton and Neutrino
8 - Noble gas used in radiotherapy is?
Radon
9 - 100% pure ethanol is called?
Absolute Alcohol
10 - Which among the following gases is most toxic?
Carbon monoxide
11 - Vicinal dihalides on treatment with zinc dust gives?
Alkenes
12 - If we remove one hydrogen atom from an alkane we obtain?
Alkyl group
13 - The highest temperature above which a gas can not be liquefied is called?
Critical Temperature
14 - Which of the following is used as filler in tyre of rubber?
Carbon Black
15 - One of the constituents of tear gas is?
Chloropicrin
16 - Polyethene is formed from polymerization of?
Ethylene
17 - Free neutron decays into?
Proton, Electron, Neutrino
18 - Common name for the compound having formal NaOH is?
Caustic soda
19 - Freezer in a refrigerator is fitted near the top?
It facilitates convection currents
20 - Butter is an example of solution?
Liquid in solid
21 - Alcohol prepared by the distillation of wood is?
Methyl alcohol
22 - Which of the following is ozone depleting pesticide?
Methyl Bromide
23 - Which three metals are all liquid at 300 C?
Hg, Ga, Cs
24 - Plaster of paris is made partial dehydration of?
Gypsum Salt
25 - Commercial nitric acid is coloured because it contains dissolved?
Nitrogen dioxide
26 - Among following which is least soluble in water?
Benzene
27 - What is the empirical formula of benzene?
CH
28 - What is the mass of a proton?
1.0073 amu
29 - The oxidation number of Nitrogen in HNO3 is?
5
30 - 's' and 'p' block elements are called?
Representative elements
31 - Which element is deposited at the cathode during the electrolysis of brine in Nelson cell?
Na
32 - Among following which organic compound have fruity smell?
Ester
33 - The temperature of oxy-acetylene flame is around?
32000C
34 - What is the most commonly used substance in fluorescent tubes?
Mercury vapour and argon
35 - Two isotonic solutions will have same?
Osmotic pressure
36 - Electrons can revolve only in those orbits which have fixed angular momentum?
mvr=[nh/2Î ]
37 - According to Lechatlier principle in a reversible reaction between solid and liquid, the amount of heat added is?
Increase of the concentration of solid
38 - Lyman series is found in?
Ultraviolet Region
39 - Which material is found in Monazite sand?
Thorium
40 - A white salt is readily soluble in water and gives a colorless solution with a pH of about 9. The salt would be?
CH4COONA
41 - The molecule which shows some common lines in the IR and Raman spectra is?
N2O
42 - Phenolphtalein is colourless in acidic medium due to?
Benzenoid form
43 - Isothermal system is one in which?
ΔT=0
44 - Which of the following is a method of disposing of solid waste which can not be reused or recycled?
All of the above
45 - Tyndall effect is the main characteristic which distinguishes colloids from?
Solutions
46 - ___ is a reduction reaction.
Cl+1e€“€”>Cl€“
47 - Amount of chlorine available in water after disinfection is called?
Residual chlorine
48 - Molten KCl conduct electricity because of?
Free ions
49 - Which of the following chemical used in the processing of anti polio vaccine?
Formaldehyde
50 - The number of allotropes of phosphorus in solid state is?
4
51 - Soap is prepared by boiling caustic soda with?
Fats
52 - Number of acidic hydrogen atoms present in a molecule of an acid is called?
Basicity
53 - Chemical used in photography is?
Silver bromide
54 - Molecular ions are produced by?
Both A & C
55 - A reaction in which a chemical substance breaks down to form two or more simple substances is called?
Decomposition reaction
56 - At higher altitudes boiling points of liquids?
Decreases
57 - What is the empirical formula of Glucose?
CH2O
58 - Non-heme iron-sulfur proteins are involved in?
Electron transfer
59 - Number of Pi electron in benzene is?
6e
60 - Bronze is an alloy of?
Copper and Tin
61 - Why hydrogen is not found in atmosphere?
It is the lightest gas
62 - Substance most commonly used as a food preservative is?
Sodium salt of benzoic acid
63 - Photo oxidation process is initiated by?
Light
64 - How many sulphur atoms are present in a puckered ring?
8
65 - The sewage obtained from water closets and urinals is known as?
Sanitary waste
66 - Who classified element first time?
Lother Meyer
67 - Modern periodic table consists of?
Four Blocks
68 - Synthetic detergents are made from?
Sodium salt of benzene sulphonic acid
69 - What is carbamide?
A Fertilizer
70 - Maximum water vapour content in the atmosphere is?
3 to 4 Percent
71 - Which of the following gases is present under pressure in soft drinks?
Carbon dioxide
72 - Which of the following is a monatomic gas?
Neon
73 - Which catalyst is used in contact process?
V2O5
74 - The molar mass of H2SO4 is?
98 g
75 - For an ideal gas, internal energy (U) is a function of?
Temperature only
76 - Which among the following is a neutral substrate?
Ethyl Chloride
77 - What is iodised table salt?
A heterogeneous mixture
78 - One atmospheric pressure is equal to how many pascals?
101325
79 - Ions gains which charge when electrons are removed?
Positive charge
80 - Gun powder consist of a mixture of?
Nitre, Sulphur and Charcoal
81 - Why ice floats on water?
Water is denser than ice.
82 - Which of the following is not a precious/semi-precious stone?
Pearl
83 - Metals can form ions carrying charges?
All are correct
84 - Commercially sodium bicarbonate is known as?
Baking soda
85 - Which equation is not effected by change in pressure?
1/2N2+1/2O2€”>NO
86 - Drinking soda is?
Acidic
87 - "All the four quantum numbers of two electrons in an atom are not the same" It is law of?
Exclusion principle of Pauli
88 - The mass of (1) mole of substances expressed in grams is called?
Formula mass
89 - Which among the following is "Fool's Gold"?
Iron Sulfide
90 - A type of blood disease which is caused by radiation such as X-Rays and Gamma Rays is?
Leukemia
91 - Which among the following elements is found in maximum percentage in the human body?
Oxygen
92 - which of the following gas explodes on compression to a liquid?
Ethyne
93 - When an electronegative element combined with an electro positive element the type of bonding is called?
Ionic
94 - Atomic number of Copper is?
29
95 - Which of the following is used in making smoke bombs?
Carbon
96 - Acid used in the manufacture of synthetic fiber is?
Acetic acid
97 - ___ is an electron deficient molecule.
BF3
98 - which of the following is used as filler in tyre of rubber?
Carbon Black
99 - Size of atom in positive ion decreases because?
Outermost shell loses
100 - Element that is in highest percentage in the composition of the earth?
Oxygen
101 - Straight chain hydrocarbons are?
In which atoms of C are in a series
102 - Ethers show the phenomenon of?
Metamerism
103 - Which of the following is least polar?
SiCl4
104 - Which metal gives golden yellow flame on burning in air?
Sodium
105 - The EAN value of Ni(CO)4 is?
36
106 - IR determine ___ bond.
Nature of bond
107 - Seaweeds are important source of?
Iodine
108 - Among the following which is not an electrolyte?
Sugar solution
109 - The density of O2 gas at 20 Degree Centigrade is?
1.4 gdm-3
110 - Mineral containing both magnesium and calcium?
Dolomite
111 - The most abundant element occurring in the earth crust by weight is?
Oxygen
112 - Oxidation number of P in KH2PO2 is?
1
113 - What is the most abundant element in human body?
Oxygen
114 - Impure camphor is purified by?
Sublimation
115 - ___ is a disaccharide.
Sucrose
116 - A radioactive substance emits?
All of the above
117 - Which among the following is fire resistant?
Asbestos
118 - Existence of nucleous is confirmed by?
Alpha scattering by thin metal foil
119 - Which among following is responsible for extra strength of pyrex glass?
Borax
120 - Shared pair of electrons which links the atoms in a molecule is known as?
Covalent bond
121 - What is the number of known crystalline phases of water?
15
122 - Which gas diffuses fast?
Hydrogen
123 - Function of sedimentation tank in sewage treatment is to?
Remove suspended solids
124 - Which of the following elements have the highest values of ionization energy?
Inert gases
125 - Which type of cathode is used to focus cathode rays on a platinum foil?
Concave cathode
126 - Morality is the number of moles of solute dissolved in?
1 dm3 of solution
127 - Flavour of apple is mainly due to which one of the following?
Ethanol
128 - Which one has zero octane number?
n-Heptane
129 - Buckey-balls are basically the allotropes of?
Carbon
130 - Almost all amides exist in?
Liquid State
131 - The unit of rate constant depends upon?
Concentration terms
132 - Order of reaction is?
Can be determined from experiment.
133 - Symbol of Potassium is?
K
134 - Which among the following is pure matter?
Carbon Dioxide
135 - An element that does not occur in nature but can be produced artificially is?
Plutonium
136 - ___ halegen have lowest electronegativity?
Iodine
137 - Which of the following is a super cooled liquid?
Glass
138 - Electrostatic attraction between positive ions and the electrons of the atoms is called?
Metallic bond
139 - Aspirin is chemically known as what?
Acetylsalicylic acid
140 - Wax used for making candle is chemically a mixture of?
Aliphatic Hydrocarbons
141 - Which one of the following is used to restore the colour of old oil paintings?
Hydrogen peroxide
142 - Spontaneous chemical reaction takes place in?
Galvanic cell
143 - ___ burns with brick red flame.
Calcium
144 - Detergents clean surfaces on the principle of?
Surface tension
145 - Formation of water from hydrogen and oxygen is called which type of reaction?
Redox chemical reaction
146 - Molecularity of reaction is always in?
Wholw number
147 - Wave equation for hydrogen atom was set up by?
Schrodiner
148 - The gas collected at cathode is?
H2
149 - Refrigerant "FREON" is?
Difluoro Dichloro Methane
150 - Bracket series is found in?
Infrared Region
151 - An emulsion is a colloid of a?
Liquid in a liquid
152 - The maximum number of electrons in L-Shell is?
8
153 - Percentage of carbon in steel ranges from?
0.1 to 1.5
154 - Sodium vapour lamps glow with yellow colour. This is due to?
The emission of excess energy absorbed by sodium atoms in the yellow region of the spectrum
155 - Strongest oxidizing agent is supported by?
High electron affinity
156 - Identify which is quick silver?
Mercury
157 - A gas has 2 litre volume at STP at constant pressure, at which temperature the new volume will be 4 litre?
50 Degree Centigrade
158 - Material used to make electric heater coil?
Nichrome
159 - Number of proton+number of neutron is the __ of an element.
Mass number
160 - Radioactive dating is a technique which can be used to measure?
Age of rocks
161 - Why most atoms are neutral?
Number of electrons are equal to number of neutrons
162 - Anhydride of HClO4 is?
Cl2O7
163 - Which among following have highest boiling point?
Propanal
164 - Galvanized iron is made by coating iron with?
Zinc
165 - Which of the following produces highest amount of energy upon oxidation?
Fat
166 - What is the color of iodine?
Purple
167 - Candle is a mixture of?
Paraffin wax and stearic acid
168 - Physisorption occur at?
Low temperature
169 - Solution contains more water?
0.25 M
170 - Average mass of natural mixture of isotopes which is compared to the mass to the mass of one atom of C-12 amu is called?
Atomic mass
171 - Alum stops bleeding in minor cuts because of?
Coagulation
172 - The helical structure of proteins is stabilized by which bond?
Hydrogen
173 - Scattering of light takes place in?
Colloidal solution
174 - Which of the phosphorous has tetrahydral, tetra atomic molecules and is mol reactive?
Violet
175 - Isotope used for the production of atomic energy is?
U-235
176 - Which among the following is homogeneous?
A solution
177 - Two elements which are used to absorb neutrons to control the chain reaction during nuclear fission are?
Boron and Cadmium
178 - Table salt gets moist during rainy season because?
Sodium chloride contains hygroscopic impurities like magnesium chloride
179 - What is called pressure vs temperature equation?
None of the above
180 - Which process is called inversion?
Hydrolysis of proteins
181 - ___ will show negligible effect of temperature on its solubility.
NaCl
182 - The suspended particles in suspensions are generally of the size?
1200 nm
183 - Commercial vulcanisation of rubber involves?
Sulphur
184 - Why soap helps in cleaning clothes?
It lowers the surface tension of solution
185 - Anhydride of HClO4 is?
Cl2O7
186 - In colourful diamond different colours are present due to?
Impurities
187 - Colloidal particles are?
Neutral
188 - Who opposed the idea that cell is empty space bounded by thick wall?
Robert Brown
189 - Purity of gold is expressed in carats. The purest form of gold is?
24 Carats
190 - Which among the following has not fuctional group?
Toluene
191 - Type metal used in printing press is an alloy of?
Lead and Antimony
192 - One gram molecule of H2 is?
2 gram
193 - Setting of plaster of paris involves?
Hydration to form other hydrates
194 - Cement is usually a mixture of?
Calcium Silicate and Calcium Aluminate
195 - Chloro group is Ortho and para but __ withdrawing.
Electron
196 - When a multidentate ligand is surrounded it is known as?
Chelates
197 - For generation of biogas materials commonly used are?
Animal wastes
198 - Ions with negative charge and extra electrons are called?
Anions
199 - Enzyme that converts glucose to ethyl alcohol is?
Zymase
200 - Radioactive disintegration of uranium ultimately results in formation of?
Lead
201 - PVC which is a plastic is the short name for?
Poly Vinyl Chloride
202 - An atomic clock is based on transitions in?
Caesium
203 - Among following identify which is not a organic compound?
Water
204 - ___ is Lewis base.
NH3
205 - __ is the short hand method to describing a chemical reaction.
Chemical Equation
206 - What is the name of scientist who named anode rays as proton?
Rutherford
207 - Which among the following is in liquid state at normal room temperature?
Mercury
208 - The most important Oligosaccharides is?
Sucrose
209 - An example of semiconductor is?
Germanium
210 - Major constituent of air is?
Nitrogen
211 - First metal used by a man was?
Copper
212 - Reaction between fat and NaOH is called?
Saponification
213 - The oxidation of all elements in free state is?
Zero
214 - Which one of the following is softest?
Sodium
215 - Purest form of carbon is?
Diamond
216 - What is the percentage of lead in lead pencils?
Zero
217 - Atomic number of carbon is 6 and its atomic mass is 12. How many are there protons in the nucleus of carbon?
6
218 - The number of moles of solute in 500 cm2, 3M solution is?
1.5
219 - What is the atomic mass of sulphure?
32.06
220 - which of the following compound not considered as organic compound?
Carbon Dioxide
221 - Addition of unsymmetrical reagent to an unsymmetric alkene follows the rule?
Markownihoff's Rule
222 - Which is the purest form of iron?
Wrought iron
223 - Method of converting high boiling hydrocarbons into low boiling hydrocarbons is called?
Cracking
224 - Air is an example of a solution of?
Gas in gas
225 - Among group VA elements most electronegative element is?
N
226 - Depression in the F.P is directly proportional to?
Molarity of solution
227 - The percentage value of O2 by weight in atmosphere is?
0.21
228 - Which among the following metals provides amphoteric oxide?
Aluminium
229 - On addition of salt to water its?
Boiling point increases
230 - Group number represents?
Same number of electron in valance shell
231 - Uric acid is found in?
Urine
232 - The necessary condition for the equilibrium for an isolated system is that its entropy shall be?
Maximum
233 - Catalyst is a substance which?
None of the above
234 - Elements are represented by which of the following?
Symbols
235 - During manufacturing process of cement the temperature of decomposition zone goes up to?
9000 C
236 - Theory of mutation was propounded by?
De-Vries
237 - Methane is used in daily life with the name of?
Natural gas
238 - The color of Hydrogen Iodide is?
Colourless
239 - Which of the following is chiefly present in LPG?
Butane
240 - Which gas does not pollute air?
Nitrogen dioxide
241 - In the evaporation process liquid molecules which leave the surface of the liquid have?
Very high energy.
242 - Vertical columns in periodic table are called?
Groups
243 - Which of the following is used to iodise common salt?
Potassium iodate
244 - One of the following is used to dissolve noble metals. That is?
Aqua Ragia
245 - What is the symbol of Barium?
Ba
246 - Which among following in automobile exhaust can cause cancer?
Polycyclic Hydrocarbons
247 - Tyndall effect is not observed in which of the following?
Emulsions
248 - ___ element is found in most abundance in earth crust.
Oxygen
249 - Colloids are example of which equilibria?
Heterogeneous equilibria
250 - Milk of magnesia is a suspension of?
Magnesium hydroxide
251 - An emulsifier is an agent which?
Stabilises an emulsion
252 - Difference between particle mass and real mass is known as?
Mass defect
253 - What is the name of that system which uses radioactivity to decide the period of materials of pre historic period?
Carbon dating
254 - Carboxylic acids on reduction with HI and red phosphorous gives?
Alkanes
255 - Atom number of protons are equal to?
Number of electrons
256 - Technique of calculating the age of fossil organisms is?
Radiocarbon Dating
257 - Which of the following exists as as hexamers along with monomers in its vapour phase?
HBr
258 - Addition of gypsum to Portland cement helps in?
Preventing rapid setting of cement
259 - Pasteurisation of milk means?
Heating of milk to above 620 C
260 - Which of the following terms is not used for ionic compounds?
Molecular formula
261 - Which of the following element has its outermost energy level complete?
All of the above
262 - Which of the following is not a nucleon?
Positron
263 - Which of the following chemical is used for the preparation of artificial flavors and essences?
Ethyl Acetate
264 - 18 grams of H2O contains __ molecules.
6.02×1023
265 - Which among the following have highest fuel value?
Hydrogen
266 - Fertilizer having high nitrogen content is?
Ammonium nitrate
267 - Alkali metals belongs to?
1st group
268 - Methyl group is Ortho and P-directing because?
All of the above
269 - Bleaching action of moist sulphur dioxide is because of its?
Reducing property
270 - Triple covalent bond involves ___ electrons.
6
271 - Which among the following is called Hypo?
Sodium Thiosulphate
272 - Which radiations emit when slow moving neutrons hit the copper metal?
Gamma
273 - the concept of four elements on earth was introduced by?
Empedocles
274 - Chemical formula based on actual number of molecules is called?
Molecular formula
275 - Colloidal solutions are purified by all except?
Crystallization
276 - Which of the following gaseous hydrides most readily decomposed into its elements on contact with a hot glass rod?
HCL
277 - A reverse reaction is not that?
Which takes place from left to right
278 - When alumina place in path of cathode rays it glows?
Blue
279 - In dry cell the electrolyte is a moist paste of?
NH4Cl and ZnCl2
280 - Petroleum is mainly a mixture of?
Saturated hydrocarbons
281 - Residue left after extracting juice from sugar beet and sugarcane is called?
Bagasse
282 - Replacement of hydrogen atom by €“ SO3H group in benzene is called?
Sulphonation
283 - Identify correct statement among following?
Metallic character increases down the group
284 - Alkanes can not show cis-trans isomerism?
Alpha bond requires less energy to be rotated
285 - Butter is an example of a?
Emulsion
286 - Heterogenous catalysis is based on?
Adsorption
287 - What is the purest form of water?
Rain water
288 - Tip of the match-stick contains?
Potassium chlorate
289 - Toluene is prepared from benzene is?
Fridel craft reaction
290 - An acid that produces large number of H+ ions in aqueous solution is called?
Strong acid
291 - A reaction in which a substance burns in oxygen to produce heat and flame is called?
Combustion
292 - Highest electronegative element is?
Fluorine
293 - Fermentation of ethanol to ethanoic acid is achieved by?
Acetic Invertase
294 - ___ protects the earth surface from ultraviolet radiations.
O3
295 - Which individual units loose identity?
Compound Salts
296 - Amino acids are identified in paper chromatography by?
Ninhydrin Test
297 - Who gave the concept of Atom's orbit?
Neil Bohr
298 - Acid used in lead storage cells is?
Sulphuric acid
299 - Polymeric substance used to make parachute is?
Viscose
300 - Nelson's cell is used to prepare caustic soda along with gases. Which gas is produced at the cathode?
H2
301 - Least soluble in water among following is?
Benzene
302 - Which of the following hydrocarbons is liquid at room temperature?
Hexane
303 - Anode in a dry cell consists of?
Zinc
304 - Which of the following gases is used in cigarette lighters?
Butane
305 - The polymerisation of which of the following is used in manufacturing of polythene in industry?
Ethylene
306 - Where does the oxygen that keeps us alive come from?
Water
307 - Non stick kitchen wares are coated with?
Teflon
308 - Helium gas is used in gas balloons instead of hydrogen gas because it is?
Non combustible
309 - Coal gas mainly consists of?
Methane and Hydrogen
310 - Alkenes are prepared from alcohols by a process called?
Dehydro Halogenation
311 - Bond which is formed by the transfer of one or more electrons from one atom to another atom is called?
Ionic bond
312 - Tincal is a mineral of?
B
313 - The four bonds of carbon in methane are directed towards the corners of?
Tetrahedron
314 - C €“ H bond distance smallest in?
Ethene
315 - The oxidation number of chromium in K2Cr2O7 is?
6
316 - Concentration of the copper ore is carried out by?
Froth Flotation process
317 - 44 amu of CO2 is equal to?
Molecular mass
318 - What is the percentage of nitrogen in urea?
0.46
319 - Isobars are lines joining places having equal?
Pressure
320 - Minst is an example of which solution?
Liquid in gas
321 - What is the atomic weight of uranium?
238
322 - Process of smelting and cooling converts pig iron into?
Cast Iron
323 - Which one of the following elements has chemical properties most like those of sulphur?
Se
324 - Charge on electron was discovered by?
Millikan
325 - Which of the following is a greenhouse gas?
Carbon dioxide
326 - Substances having a tendancy to lose one or more protons are called?
Acids
327 - who discovered sulphuric acid?
Jabir Bin Hayan
328 - What is the name of scientist who named cathode rays as electrons?
Stonely
329 - Preparation of Dalda ghee from vegetable oil utilizes which process?
Hydrogenation
330 - In laboratory urea was prepared by?
Wohler
331 - One AMU atomic mass unit is equat to?
1.66×10-24g
332 - Main source of carbon monoxide is?
Transportation
333 - Which compound is not soluble in water?
C6H6
334 - Which one is occur in whole number always?
Atomic number
335 - Which of the following alloy is used in making magnet?
Elniko
336 - Who discovered elecrons?
John Thomson
337 - Metallic constituents of hard water are?
Calcium, Magnesium and Iron
338 - Freezing point of equimolal aqueous solutions will be minimum for?
NH4Cl
339 - The maximum work that can be done by a reversible engine operating between 500 K and 200 K if 1000 J is absorbed at 500 K is?
600 J
340 - Process by which milk is converted to curd is called?
Fermentation
341 - Speed of slow neutron is below __ energy.
1 eV
342 - Formula of urea is?
NH2CONH2
343 - Liquid waste from kitchens and baths of residences is known as?
Sullage
344 - Ozone is present in which layer of the atmosphere?
Troposphere and Stratosphere
345 - Gas responsible for swelling of bread is?
Carbon dioxide
346 - Which one of the following acids is used for the etching glass?
HF
347 - Detergents are?
Sodium salts of sulfonic acids
348 - Earth atmosphere is an envelope of gases extending to a height of?
200 Km
349 - 4th and 5th period of the long form of periodic table are called?
Long periods
350 - Enthalphy of heat of formation of sodium ion from its atom is known as?
First ionization energy
351 - Which of the following is biodegradable?
Paper
352 - A metal does float on water gives vigorous reaction with water so much that it reacts with ice at -100 Degree Centigrade. The metal is?
Na
353 - A double bond consists of?
One sigma and one Pi bonds
354 - The 1HNMR spectrum of ferrocene at room temperature shows?
A singlet
355 - A complete reaction is in which all Reactants changed into ____ .
Products
356 - Presence of glucose in urine can be detected by?
Fehling's test
357 - Which neutrons are more effective for fission process?
Slow neutrons
358 - 50 Kg of caol tar on fractional distillation produces benzene amount?
0.5 to 1 Kg
359 - Attraction between the positive hydrogen and negative F, O or N is called __ bonding.
Hydrogen
360 - Virus is?
Nucleic acid and protein
361 - All of the following are different uses of hydrogen peroxide except?
Used as fuel in space
362 - Mass of electron is __ times less than mass of proton.
1836
363 - Chile saltpetre has the chemical formula?
NaNO3
364 - The periodic arrangement was the result of?
Mendeleev
365 - e/m for positive rays is __ e/m for negative ray.
Smaller than
366 - M shell can accommodate number of electrons?
18
367 - Major pollutants of cigarette smoke?
Carbon Monoxide and Nicotine
368 - Which of the following is not present in German silver?
Silver
369 - Gas used in the artificial ripening of fruits is?
Acetylene
370 - Nucleus have?
Neutrons and Protons
371 - Aluminium bronze is an alloy which has composition of?
10% Al and 90% Cu
372 - What is the most abundant element occuring in the ocean?
Oxygen
373 - Oxidation number of Hydrogen in HCL is?
1
374 - ___ halogen has the lowest electronegativity.
Iodine
375 - In sour milk which acid is present?
Formic acid
376 - Rate of chemical reaction is __ when it proceed.
Decrease
377 - Substance which does not expand on going from liquid state to solid state is?
Type metal
378 - Ratio of pure Gold in 18 carat gold is?
0.75
379 - The manufacture of iron from iron ore involves the process of?
Reduction
380 - Which is not a nucleophile?
BF3
381 - The alkali and alkaline earth metals can not be used as electrodes in voltaic cells based on water as the solvent because of their rapid?
Oxidation
382 - CO2 is a?
Covalent molecule
383 - Difference between crystalloids and colloids is known as?
Particle size
384 - Which among the following stage is suitable indicator when solution of sodium carbonate is mixed with sulphuric acid?
Methyl Orange
385 - In the ground state of an atom the electron is present in?
Nearest to the nucleus
386 - Which of the toxic heavy metals is found in modem tannery industries?
Chromium
387 - The isomer shift in Mossbauer spectra depends upon?
s-electron density
388 - Who gave cyclic structure of benzene?
Kekule
389 - Which statement is falsse about electrons?
Oriented by magnetic field
390 - which among following contains high content of lead?
High octane fuel
391 - Milk is a natural?
Emulsion
392 - Which among the following is not biodegradable?
Lab detergents
393 - Which of the following is a natural dye?
Alizarin
394 - Chemical name of common salt is?
Sodium chloride
395 - Which among the following has basic amino acid?
Glycine
396 - Which one of the following compound does not explode?
Amine Toluene
397 - Ruby and sapphire are oxides of?
Aluminium
398 - Weakest base is?
Cl
399 - C11-L-methyl-methionine is used for?
Brain tumor and parathyroid imaging
400 - Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful?
Solar ultraviolet radiation
401 - Color of concentrated solution of KMnO4 is?
Purple
402 - Two metal ions that cause hardness to water are?
Calcium, Magnesium
403 - German silver is an alloy of?
Zinc, Copper and Nickel
404 - If the salt bridge is not used between two half cell then the voltage?
Drops to zero
405 - Hydrolysis of ethyl acetate into acetic acid and ethanol in presence of mineral acid is?
A fractional order reaction
406 - The pH of human blood is between?
7.5 to 8
407 - Substance that is added to make natural rubber strong and more bouncy is?
Sulphur
408 - Ultraviolet radiation striking the earth is due to the depletion of?
Ozone
409 - Ions gains which charge when electrons are added?
Negative charge
410 - The splitting occurs in the Mossbauer spectrum due to asymmetric environments, it is called?
Quadrupole splitting
411 - Which is used in the hydrogenation of vegetable ghee?
Nickel
412 - Among following which sulphate is not soluble in water?
Barium sulphate
413 - ___ is an example of amorphous solid.
Plastic
414 - A mixture of water and alcohol can be separated by?
Distillation
415 - A universal solvent on earth is?
Water
416 - What is the unit of active mass?
Gram atom per litre
417 - At dynamic equilibrium state?
The rate of forward and reverse reaction is equal
418 - Which halogen is a solid at room temperature and pressure?
I2
419 - The lustrous non metal is?
Iodine
420 - Copper forms colorless bead in borax bead test in reducing flame. The oxidation state of copper is?
1
421 - Chlorine and bromine give photochemical chain reaction with?
Hydrogen
422 - In graph of atomic volume versus atomic weight the elements corresponding to peaks in the curve belong to?
Group €“ 4
423 - which of the following fibres catches fire least?
Cotton
424 - Compound used in the processing of anti-polio vaccine is?
Formaldehyde
425 - Identify the molecule with double covalent bond?
O2
426 - Sea water can be purified by the process of?
Distillation
427 - To which class of compounds enzymes belongs?
Proteins
428 - Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes?
Sodium chloride
429 - Chemical used for cloud seeding for artificial rains is?
Silver Iodide
430 - Ozone consists of?
Oxygen only
431 - Biochemistry is the backbone of?
Living organisms
432 - Philosopher's Wool is?
Zinc oxide
433 - Which of the following is used as a lubricant in heavy machines?
Graphite
434 - Water that can produce good lather with soap is known as?
Soft water
435 - In which of the following substances all carbon atoms are quaternary in nature?
Diamond
436 - Among following all are water borne diseases except?
AIDS
437 - Long form of periodic table contains __ groups.
18
438 - Haber process is used to produce which among the following?
Ammonia
439 - Which of the following is not an inner transition elements?
Cerium
440 - Major harmful gas emitted by automobile vehicle which causes air pollution is?
Carbon dioxide
441 - Ether shows the phenomenon of?
Metamerism
442 - Inorganic natural resource of the earth is?
Mineral fuels
443 - Colour of transition metal complexes is due to?
D-D transition of electrons
444 - Substance which readily forms colloidal solution in contact with water is called?
Hydrophilic colloid
445 - Glitter of diamond is?
Due to its quality of reflecting light
446 - By which organic compound all the oils are known?
Hydrocarbon
447 - Zn2++2e- €”->Zn(s). This is?
Reduction
448 - Oxime is also known as?
Formaldehyde Amine
449 - After three half lives of a chemical reaction the percentage fraction of the amount left is?
12.5
450 - What is the atomic number of potassium?
19
451 - According to simple collision theory the Arrhenius factor A?
Independent of temperature
452 - Speed of fast neutron is __ energy.
1.2 Mev
453 - When there are two electrons in the same orbital they have?
Opposite spin
454 - Which compound decolorize KMnO4 solution but not give test with AgNO3 solution?
Ethylene
455 - Nuclear fuel in the sun is?
Hydrogen
456 - A balloon filled with helium rises in air because?
Helium is less dense than air.
457 - The element which is present in liquid state at room temperature is?
Bromine
458 - Electrophile in aromatic sulphonation is?
SO3
459 - Heat resistant variety of glass is?
Flint glass
460 - Which compound will have maximum repulsion with H2O?
C6H6
461 - Substance used as an antifreeze in radiators of automobiles is?
Methyl Alcohol and H2O
462 - Atomic arbital needs at least __ of volume of space to find an electron.
0.95
463 - Diamond is harder than graphite because?
Difference in layers of atoms
464 - Long form of periodic table contains __ periods.
7
465 - Formalin is __ solution of Formaldehyde in water.
0.4
466 - Number of isotopes of hydrogen is?
3
467 - Who discovered protons?
Eugene Goldstein
468 - Ammonal is a mixture of?
Aluminium powder and ammonium nitrate
469 - Nuclear energy is a mineral based energy source. It is derived from?
Uranium
470 - Natural source of hydrocarbon is?
Crude oil
471 - Water can be separated from alcohol water mixture by?
Distillation
472 - __ is the number of positive charges in the nucleus of an atom.
Atomic number
473 - Denatured spirit is ethanol mixed with?
Pyridine
474 - In which of the following states maximum iron ore is found?
Fe2O3
475 - The gas which shows deviation from ideal behaviour is known as?
Ammonia
476 - Gases are the lightest form of matter and their densities are expressed in the form of?
g dm-3
477 - The best disinfectant is?
Chlorine
478 - Pitch is black residue of?
Coal Tar
479 - Identify correct statement among the following?
Order of reaction is in fraction.
480 - Argon and which gas is used in various types of fluorescent and phototubes?
Krypton
481 - In its reaction with silver nitrate, shows?
Oxidising property
482 - Which of the following acid is present in Tamarind?
Tartaric acid
483 - Gas used for artificial fruit ripening of green fruit is?
Ethylene
484 - Ratio of C:Si in their neutron ratio with atomic weight having 12 and 28 respectively?
0.12986111111
485 - Which among the following is extensively used for sterilizing water?
Bleaching Powder
486 - 5 moles of H2O are equal to?
90g
487 - Which bond is most polar?
C €“ F
488 - Unit of molar concentration is?
Mol dm-3
489 - Extremely used metal is?
Iron
490 - Quartz is made of?
Sodium silicate
491 - Which of the following substance is highly plastic?
Clay
492 - Which material used in the manufacturing of lead pencil?
Graphite
493 - Alum is used as?
A purifier for water
494 - Liquified Petroleum Gas LPG consists of?
Butane and Propane
495 - For a Van Der Waals gas the critical compressibility factor, Ze should have the value at the critical point to be?
0.375
496 - Which of the following is not a colligative property?
Boiling point of solution
497 - Who conducted Alpha Scattering experiment?
Earnest Rutherford
498 - Acid rain is caused due to pollution of atmosphere by?
Oxides of nitrogen and sulphur
499 - Who discovered oxygen?
J.Priestly
500 - Acid rain destroys vegetations because it contains?
Sulphuric acid
501 - Which one of the following metals does not react with water to produce hydrogen?
Cadmium
502 - Among following which is used as an explosive?
Nitroglycerine
503 - The isotope c-12 is present in abundance of?
0.989
504 - Which of the following chemical materials is responsible for the depletion of ozone layer in the atmosphere?
Chlorofluorocarbon
505 - What is the chemical formula of Chloroform?
CHCl3
506 - Milk tastes sour when it is left in open for some time. This happen due to the formation of?
Lactic acid
507 - The brown atom is formed of which element when MnO2 and concentrated H2SO4 is added in them?
NO2
508 - Galvanization is the?
Deposition of Zinc on Iron
509 - Which of the following hybrids is highly unstable?
PH3
510 - P-Fund series is found in?
Infrared Region
511 - Cloud is a colloidal dispersion of?
Water drops in a dispersion medium of air
512 - Space rockets use fuel which is liquid oxygen mixed with liquid?
Hydrogen
513 - Methane is slightly soluble in water due to its?
Non-polar Nature
514 - In the reaction PbO + C †’ Pb + CO?
C acts as a reducing agent
515 - Percentage of oxygen in earth crust is?
0.53
516 - Enzymes are?
Biological catalyst
517 - Most common example of corrosion is?
Rusting of iron
518 - Which one of the following metals pollutes the air of a city having large number of automobiles?
Lead
519 - ___ disease causes diarrhea.
Cholera
520 - Identify Marsh gas among following?
CH4
521 - Who discovered that nucleus is very small and have positive charge?
Earnest Rutherford
522 - Raw materials used for manufacturer of glass are?
Sand, Soda, Limestone
523 - Which of the following statement is correct about Newland's law?
He arranged all known elements in tabular form.
524 - Solder is an alloy of?
Tin and Lead
525 - Forces which holds atoms together in a molecule are called?
Chemical Bond
526 - Le Chatelier's principle states that when a stress is applied to a system in equilibrium, system will __ stress.
Adjust to reduce
527 - Electric fuse is an alloy of?
Tin and lead
528 - Main constituent of bio gas is?
Methane
529 - An atom is how much times bigger than nucleus?
10000
530 - Positive rays produce flashes on?
Zinc Sulphide Plate
531 - Which among following is used in welding broken pieces of iron rails and machine parts?
Aluminium powder
532 - Fundamental particles present in the nucleus of an atom are?
Proton, Neutron
533 - The number of IR active bands in H2O molecule is?
3
534 - A primary pollutant is?
CH4
535 - In soft drink the solvent is?
Water
536 - The three elements most needed in common fertilizers are?
Nitrogen, Potassium and Phosphorous
537 - Why does milk curdle?
Fermentation of lactose
538 - Long form of periodic table is based upon?
Atomic number
539 - When a molecule lose or gain electron it forms a?
Molecular ion
540 - Who developed atom bomb?
J.Robert Openheimer
541 - Which of the following is caused by higher concentration of Phosphorous and Nitrogen?
Eutrophication
542 - ___ consists of four sub shells.
N shell
543 - A beam of electrons emitted from the cathode of a high vacuum tube is called?
Cathode rays
544 - Beryllium sulphate is less soluble in water due to?
High inflammable energy
545 - Formula of Baking soda is?
NaHCO3
546 - If a liquid has PH 7 then it must?
Be neutral
547 - When formaldehyde and potassium hydroxide are heated we get?
Methyl alcohol
548 - Identify wrong statement about ionization energy.
It decreases in a period
549 - Bleaching powder used in drinking water as a?
Disinfectant
550 - The elements which are present on the extreme left side of the periodic table are called?
Alkali Metals
551 - Which method is used for the purification of bauxite containing excess of silica SiO2 as an impurity?
Serpek's Method
552 - Entropy of the universe is?
Always increasing
553 - Which effect cathode rays have?
Reducing
554 - Chief constituent of vinegar?
Acetic Acid
555 - Micro nutrients are required in a quantity ranging from?
6 to 200 g
556 - Who introduced the concept of atom with central necleus?
Rutherford
557 - Which of the following statements is correct about Galvanic cell?
Reduction occurs at anode
558 - The natural abundance of O16 is?
0.9976
559 - Who discovered genetic material?
Fred Griffith
560 - Polymer used in making plastic crockery is?
Melamine
561 - Which metal have highest electrical conductivity?
Silver
562 - Carbon dating method is used to determine the age of which of the following?
Fossils & Rocks
563 - Supersonic jet causes pollution by thinning of?
O3 Layer
564 - ___ is a weak electrolyte.
Ca(OH)2
565 - Which of the following pairs of materials serves as electrodes in rechargeable batteries commonly used in devices such as torch lights, electric shavers etc?
Nickel and Cadmium
566 - First evidence of existence of an atom is recorded by?
John Dalton
567 - Cement is formed by strongly heating a mixture of?
Limestone and Clay
568 - Among following iron ores highest percentage of iron content is found in?
Magnetite
569 - When equivalent quantities of acids and base are mixed salt and water are formed. The reaction is termed as?
Neutralization
570 - Smaller size of cations in Lanthanides is called?
Lanthanide contraction
571 - In which of the following Zwitter ion exist?
Alanine
572 - Which of the following gases will effuse out of football bladder most quickly?
H2
573 - which of the following is the main nitrogenous waste in humans?
Uric Acid
574 - Sour taste of Coca Cola is due to the presence of?
Phosphoric acid
575 - NMR uses which source of radiation?
Radio waves
576 - Sigma bond is __ than Pi bond.
Stronger
577 - __ is the branch of chemistry which deals with the carbon compounds.
Organic
578 - Process of removing calcium and magnesium from hard water is known as?
Water softening
579 - The BOD values of water indicate the?
Amount of oxygen used for biochemical oxidation
580 - Diamonds are glittering and attractive because light incident on them undergoes?
Multiple internal reflections
581 - Gas which turns into liquid at the lowest temperature among the following is?
Hydrogen
582 - which of the following does not produce CO2 when treated with concentrated sulphuric acid?
Soda Ash
583 - The sum of mole fractions of solute and solvent is equal to?
1
584 - A change which alters the composition of a substance is called?
Chemical change
585 - The empirical formula of Hydrogen peroxide is?
HO
586 - Which of the following type of the coal has the lowest proportion of volatile matter?
Anthracite
587 - Which of the following is a not metal that remains liquid at room temperature?
Bromine
588 - Which among following elements are generally find in free state?
Group 11 Elements
589 - A metal has an electronic configuration is M+2 has 2,8,14 and its atomic weight is 56. The number of neutrons is?
36
590 - Boric acid can not be used in?
Soda bottles
591 - In biological system what is the function of enzymes?
Catalyze Biochemical action
592 - __ are the atoms of the same elements having same number of protons but different number of Neutrons.
Isotopes
593 - In benzene there are how many types of carbon atom?
1
594 - What is the chemical name for washing soda?
Sodium carbonate
595 - Rectified spirit is converted to absolute alcohol by the dehydrating agent?
Soda Lime
596 - Branch of chemistry which deals with radio activity, nuclear processes and properties is called?
Nuclear chemistry
597 - Which type of metal salts are preffered for performing flame test?
Chlorides
598 - What is Octet rule?
Attaining of eight electrons
599 - Common battery used in automobiles in?
Lead storage battery
600 - Which of the following metals form an amalgam with other metals?
Mercury
601 - Which solvent used in IR spectroscopy?
CCL4
602 - Which compound shows hydrogen bonding?
CH3CH2.OH
603 - Hypochlorous acid HClO is unstable and readily liberates:
Atomic Oxygen
604 - A cyclotron is?
A particle accelerator
605 - Who discovered Neutrons?
James Chadwick
606 - Chloroform can be used as?
Anaesthetic
607 - Isotopes of Hydrogen are?
3
608 - By-product obtained by soap industry is?
Glycerol
609 - Rule of Triad was introduced by?
Dobereiner
610 - Silk fibre chemically is?
Protein
611 - __ is the reaction in which two or more substances combine together to form a single substance.
Addition
612 - Milk is a colloidal system in which?
Fat is dispersed in water
613 - Atomic weight of chlorine is 35. It consists of?
17 Protons + 18 Neutrons
614 - In Pakistan and other countries which of the following methods is used in manufacture of sulphuric acid?
Contact process
615 - Charcoal is used in water treatment as a?
Adsorbent
616 - Group VIB of the transition elements contains?
Cr, Mo, W
617 - The oxidation number of nitrogen in nitric acid is?
5
618 - Dehydration of alcohols can be carried out with?
H2SO4
619 - Which among the following is radioactive?
Thorium
620 - Raw materials used for the manufacture of glass are?
Sand, Soda, Limestone
621 - What is Cathode?
Cathode is negatively charged electrode
622 - substances whose aqueous solution change the blue litmus to red?
Acids
623 - What is the density of iron?
7.86 g cm-3
624 - The molality of 2% NaOH solution is approx?
0.25
625 - Bond which is formed by the mutual sharing of electrons between the atom is called?
Covalent bond
626 - 98g of H2SO4 contains?
3 moles of ions
627 - Bauxite is an ore of which of the following metals?
Aluminium
628 - Maximum permissible concentration of total hardness in drinking water is?
200
629 - Mendeleeve's periodic table was based upon the?
Atomic mass
630 - During oxidation process electrons are?
Gained
631 - Fastest reaction occur in which of the following?
The AgCl formation by the reaction of AgNO3 and NaCl
632 - Lustre of the metals is because of?
Reflection of light due to the presence of free electrons.
633 - Word 'Chemistry' belongs to which language?
Greek
634 - Number of elements in fourth period is?
18
635 - Iodized salt is beneficial for?
Thyroid function
636 - Avagodro's number is?
6.02×1023
637 - Atomic radius of Carbon is?
77 pm
638 - KCl is soluble in?
Water
639 - Aluminium can be purified from?
Electrolysis
640 - The compound which is non directional in bonding is?
KBr
641 - Petroleum is a mixture of?
Hydrocarbons
642 - Which of the following is not an intensive property?
The magnetic moment of the gas
643 - Which among the following is used as a moderator in nuclear reactors?
Graphite
644 - Saccharin is made up of?
Toluene
645 - Which of the following is the petroleum wax?
Paraffin wax
646 - Word gene was firstly used by?
Johannsen
647 - Major gaseous pollutant of the thermal power station is?
SO2
648 - Milk sugar is?
Lactose
649 - Number of groups in periodic table is?
18
650 - Which among the following does not have 8 valence electrons?
He
651 - Which of the following is used to remove rust stains on cloth?
Oxalic acid solution
652 - Cream gets separated out of milk when it is churned. This is due to?
Centrifugal force
653 - Element required for solar energy conversion is?
Silicon
654 - Inversion of cane sugar into glucose and fructose is?
Slow process
655 - Ethane and ethyne can be distinguished by their reaction with?
KMnO4 solution
656 - Preparation of ice cream is?
Excessive cooling
657 - Enzymes have ___ units.
Polypeptide
658 - A metal is exposed to the atmosphere for some time. Its becomes coated with green carbonate. The metal must be?
Copper
659 - Cathode rays were produced in discharged tube at?
High voltage
660 - Stability of nucleus is due to?
Proton and Neutron
661 - Which among the following is a carbohydrate?
Cane-sugar
662 - Bond in MgO is?
Electro-valent bond
663 - Metals commonly used for electroplating?
Chromium, Copper and Nickel
664 - Smoke is formed due to the?
Solid dispersed in gas
665 - what is the unit of ionization energy?
KJ/mole
666 - If all bullets could not be removed from gunshot injury of a man it may cause poisoning by?
Lead
667 - Which model says that atom consists of small, dense, positively charged nucleus which is surrounded by electrons revolving around it?
Rutherford's model of the atom
668 - Which color of fluorescence is produced when cathode rays strike the walls of glass tube?
Green
669 - The structure of H2O2 is?
Open Book Like
670 - In modern periodic table how many number of periods are?
7
671 - Which catalyst is used in Fridel Craft Alkylation?
AlCl3
672 - Zinc sulphide commonly used as?
Rodenticide
673 - Which of the following imparts deep blue colour to glass?
Nickel oxide
674 - Which acid is present in gastric juice?
Hydrochloric acid
675 - Identify correct statement among following?
Ionization energy of calcium is lower than that of magnesium.
676 - Permanent hardness can be removed by adding?
Na2 zeolite
677 - Oxidation number of S in H2S2O7 is:
6
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