1 - ____________ can expel proteons from paraffins
Neutron
2 - 1 a.m.u =
6 x 10-27 kg
3 - 2nd orbit is _______ away from nucleus of H-atom as compared to 1st orbit is
4-times
4 - Angle of deflection was studied by
J.Perrin
5 - Atom cannot be divided into simple unitstheorized by
Dalton
6 - Atom with higher atomic number produces X-rays of
Shorter wavelength
7 - Atomic orbits having same evergy are called
Degenerate orbitals
8 - Avogadros number may represent
All of the above
9 - Centrifugal forces are balanced in atom by
Attractive forces
10 - Charge of electron was measured by
Millikan
11 - Colour of fluorescene produced by cathode rays depends upon
Composition of glass
12 - Combustion analysis is performed to determine
Empirical formula
13 - Dempsters mass spectrometer has number of zones / parts
5
14 - Electronic configuration of K is
[Ar]4s1
15 - Empirical formula of chloroform is
CHC13
16 - For which of the following compounds the term empirical formula cannot be applied?
It can be applied to all mentioned above
17 - Free neutron changes into proton with the emission of
Both a & b
18 - How many isotopes have odd atomic number?
86
19 - Increase in atomic number is observed during
Beta emission
20 - Isotopes differ in
properties which depend upon mass
21 - Isotopes of the same elements has
different number of neutrons
22 - Mass spectrometer is used to determine Mass number of isotopes and
Relative abundance
23 - Milikan used __________ in his atomizer
Oil
24 - Molecular mass of water (18g) means
all
25 - Mostly elements have fractional atomic masses because of
atmoic masses are average masses of isotopes proportional to their relative abundance
26 - Neutrons moving with an energy of 1.2 MeV are called
Fast neutrons
27 - One mole of CO2 contains.
both b & c
28 - Percentage of calcium in calcium carbonate is
0.4
29 - Pfund series are produced in the spectrum of hydrogen atom
when electrons jump down to 5th- orbit
30 - Planks theory says energy is emitted
Discontinuous manner
31 - Positive rays are produced
By the bombardment of cathode rays on gas molecules
32 - Positive rays give flash on
ZnS
33 - Pressure in gas discharge tube was kept
01 torr
34 - Qualitative analysis is carried out for
identification of elements
35 - Quantum number which tells the energy of electron is
n
36 - Rutherford bombarded ______________ particles in discovery of nucleus
Alpha-rays
37 - Rutherfords planet like structure was defective and unsatisfactory because
all
38 - Size of molecule depends upon
Both a and b
39 - Sommerfelds modification in Bohrs model is
Orbit is elliptical
40 - Space around nucleus where finding probability of electrons is maximum is called
Orbital
41 - Spectrum is produced due to
Different wavelength
42 - Splitting of spectral lines when atom is subjected to magnetic field is called
Zeemans effect
43 - Splitting of spectral lines when atoms are subjected to strong electric filed is called
Stark effect
44 - The atomic number of an element having maximum number of unpaired electrons in p-subshell is
7
45 - The correct electronic configuration of Cu is
[Ar]3d104s1
46 - The letters s p d and f are used to represent which quantum numbers
Azimuthal
47 - The magnetic quantum number (QN) has its values determined directly by the value of
Azimuthal (QN)
48 - The mass of decimole of electrons (NA) is
054 mg
49 - The maximum number of orbitals present in a subshell that is represented by Azimuthal quantum number = 3 will be
7
50 - The nucleus of an atom of every element will always contain
protons
51 - The number of fundamental particles in an atom of the lightest isotope carbon are
18
52 - The number of isotopes of elements with even mass number and even atomic number are.
154
53 - The number of moles of CO2 which contains 16 g of oxygen is
5
54 - The number of peaks obtained in mass spectrometry shows
Number of isotopes
55 - The properties of an element mosly corresponds to that isotope which has greater
Relative abundance
56 - The relationship between energy of a photon of light and its frequency is given by
Plancks Quantum theory
57 - The sample of isotopes of an element which needs not to be vaporized in the vaporization chamer
Gas
58 - The value of e/m ratio of electron is
7588 x 1011 C/kg
59 - The velocity of the photon
Is independent of wavelength
60 - The volume occupied by 2.8 g of N2 at STP
24 dm3
61 - Three quantum number have been derived from equation of
Schrodinger
62 - Wavelength of electron was verified by
Davisson and Germer
63 - When 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether?
2
64 - When 6d orbital is complete the entering electron goes into
7p
65 - When an atom absorbs energy the lines in the spectrum will appear which are
Darker
66 - When cationic molecular ions are allowed to pass through strong magnetic field in mass spectrometer which of the following ions is fallen
lighter
67 - When electron jump into orbit 1 then series obtained is
Lyman
68 - When electrons collide with heavy metals than ______ are produced.
X-rays
69 - Which of the following are isoelectronic species?
F- Ne Na+
70 - Which of the following ion formation is always exothermic?
Uni-negative
71 - Which of the following is not a macromolecule?
maltose
72 - Which of the following methods is used to estimate hydrogen in an organic compound?
Combustion method
73 - Which of the following statements about isotopes is correct?
Isotopes with even atomic number and even mass number are abundant
74 - Which of the following statements is wrong about isotopes?
they possess different position in the periodic table
75 - Which of the following terms is not used for ionic compound?
molecular formula
76 - Which of the following terms is used for the mass of chlorine 35.5?
relative atomic mass
77 - Which one is not true about cathode rays?
Cannot ionize
78 - Which one is true about isotope?
Same chemical properties
79 - Which one of the following explain the shape of orbitals
Azimuthal quantum number
80 - Which one of the following has the maximum number of isotopes?
tin
81 - Which one of the following is not the mono isotopic element?
uranium
82 - 36 moles of each aluminium and oxygen react with each other to produce aluminium oxide. The amount of product formed is
18 mole
83 - Diameter of an atom is in the order of:
2nm
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