1 - A malleable solid is one which can be
Converted into thin sheets
2 - A solid may be made up of
a b and c
3 - All the enthalpy changes are
May or may not be a or b
4 - Amorphous substances posses
No sharp melting points
5 - At constant temperature the pressure of an ideal gas is doubled its density becomes
Double
6 - Boiling points of hydrocarbons increase with the increase in number of carbon atoms. It is mainly due to
More strength of London forces
7 - Bucky balls is an allotropic from of
Carbon
8 - Critical temperature for different gases is different and depends upon
All of the above
9 - Crystalline solids can be identified easily from their
Sharp melting point
10 - Crystallites are present in
amorphous solids
11 - During which process empty spaces between particles become minimum?
condensation
12 - For a gas where volume and pressures are 1dm3 and 2 atm respectively what should be its new volume when pressure is increased to 6 atm at constant temperature?
1/3dm3
13 - Forces of attraction which may be present between all kinds of atoms and molecules are
van der Waal
14 - Formation of vapours from the surface of a liquid is called
evaporation
15 - Hydrogen bonding is involved in
All
16 - Hydrogen effuses four times more rapidly than volume of an unknown gas molar mass of unknown gas should be
32 gmol-1
17 - Ice is ___________ crystal
Molecular
18 - Ideal gasses have all the following characteristics except.
The molecules occupy no space
19 - If 1/V is plotted on X-axis and pressure on Y-axis at constant temperature what should appear
Straight line
20 - If a physical and chemical change takes place at a constant pressure then the heat change during the process is called
Enthalpy change
21 - If we provide very high amount of heat to a liquid its boiling point will
remains constant
22 - In how many forms do matter exists?
Four
23 - In order to mention the boiling point of water at 110 Degree Centigrade the external pressure should be
Between 760 torr and 1200 torr
24 - Isomorphic substances have
Different physical and chemical properties
25 - Linds method is employed for
Liquefaction of gases
26 - Liquid crystal is discovered by
Fredrack Reinitzer
27 - Liquid gets the shape of the container when it is poured into it. Which one of the following reasons justifies it?
Liquid molecules can slide over each other
28 - Molar heat of vaporization of water is
7 KJ/mole
29 - One mole of an ideal gas at 546.5 K under 2 atm pressure has a volume of
414 dm3
30 - Rising of a wetting liquid in a capillary tube is due to
Adhesive forces
31 - Select a pair of compounds which are isomorphic in nature.
MgO and NaF
32 - Steam causes more sever burn than the boiling water because it possesses.
Latent heat of vaporization
33 - Table salt crystallizes with a
body centered cubic lattice
34 - The amount of heat absorbed when one mole of a liquid is changed into gas at its boiling point is
Molar heat of vapourization
35 - The boiling point increases down the zero group element due to
London forces
36 - The conversion of vapours back into their liquid state is called
condensation
37 - The density of water may be
Greater than that of ice
38 - The diffusion of gases at absolute zero will be
Zero
39 - The gases become non-ideal at
Low temperature and high pressure
40 - The highest temperature at which a substance can exist as a liquid is called its
Critical temperature
41 - The introduction of Kelvin scale in thermometry is according to
Charles law
42 - The kinetic molecular theory of gases was put forward in 1738 by
Bernoulli
43 - The non-ideal behaviour results chiefly from
Intermolecular attractions and finite volume
44 - The number amino acid units for each turn of helix on average are
27
45 - The number of formula units in 29.25g of common salt
01 x 1023
46 - The partial pressure exerted by the water vapours is called
Aqueous tension
47 - The phenomenon in which a compound exists in two or more crystalline forms is called
Polymorphism
48 - The pressure during the molar heat of fusion is kept
one atmosphere
49 - The processes of effusion and diffusion are best understand by
Grahams law
50 - The quantity of heat required to convert one mole of liquid into its vapours at its boiling point is called molar heat of
vaporization
51 - The solid particles only posses
Vibrational motion
52 - The spreading of fragrance or scent in air is due to
Diffusion
53 - The ttractive forces between the partial positive end of one molecule and partial negative end of other molecule are called
Dipole-dipole forces
54 - The viscosity of solids is
Infinite
55 - The weakest (in strength) of the following intermolecular forces is
Vander Waals force
56 - Under what conditions the gases deviate from the ideal behavior?
b and c
57 - Vapour pressure is not affected by
Surface area
58 - Vapour pressure of water at 100 Degree Centrigrade is
760 mm Hg
59 - Water has maximum density at
4Degree Centigrade
60 - What do we call to sudden expansion of plasma?
Joule Thompson effect
61 - What is the abundant form of matter on earth?
Solid
62 - What is the relative rate of effusion of CO and CO2?
CO is 1.25 times faster than CO2
63 - What is the simplest form of matter?
Gas
64 - What will be the pressure of 1 mole of an ideal gas maintained at 300 K and 250cm3 volume?
5 atm
65 - When substance moves from a solid to a liquid state all of the following changes occur except
K.E of the molecules decreases
66 - When the atoms of third layer are arranged in such a way that they directly lie above the atoms of first layer then this arrangement is called
ABAB (hexagonal)
67 - When water freezes at 0Degree Centigrade its density decreases due to
Empty space present in the structure of ice
68 - Which has strongest bonding in the solid state?
Sodium Chloride (NaCI)
69 - Which of the following has strongest intermolecular forces of attraction?
lodine (I2)
70 - Which of the following is not considered as an intermolecular force between molecules?
Coordinate covalent bonds
71 - Which of the following option is incorrect about gases?
All molecules move with same speed
72 - Which of the following statements is true about plasma
All of the above
73 - Which of these gases diffuse more quickly than oxygen?
NO
74 - Which one has the lowest density at room temperature?
NH3
75 - Which one is a conductor but is not malleable?
Graphite
76 - Which one is false for evaporation?
Exothermic
77 - Which one is not the partial pressure of oxygen in the lungs?
1 atm
78 - Which one is the right value for R?
0821 atm dm3k-1mol-
79 - Which one of the following does not show hydrogen bonding ?
Diethyl ether
80 - Which one of the following has highest volatility
Diethyl ether
81 - Which solids are called true solids?
Crystalline
82 - Which state of matter has the lowest density?
Gas
83 - Who made volume and pressure correction to explain deviation of gases from ideal behaviour?
Vander waal
84 - 5 mole of nitrogen gas and 0.5 mole of carbon monoxide gas at STP have same
Both b and C
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