MCQs Question Bank (Competition Preparation) - Atomic Structure, Class 11, Chemistry | EduRev Notes

Chemistry Class 11

Class 11 : MCQs Question Bank (Competition Preparation) - Atomic Structure, Class 11, Chemistry | EduRev Notes

 Page 1


1] According to Moseley the relationship between the frequency (v) of lines in X-rays
spectra and atomic number (Z) of an element is given by the expression
a) v = az - b b) z = a (v - b) c) z = a (v - b) d) v = a (z - b)
2] The increasing order of specific charge of electron (e) proton (P), alpha particle ( ? ) and
neutron (n) is
a) e, P, n, ? b) n, P, e, ? c) n, ? , P, e d) n, P, ? , e
3] The experimental evidence for the existence of atomic nucleus comes from
a) Millikan’s oil drop method b) Atomic absorption spectroscopy
c) The magnetic bending of cathode rays d) Alpha scattering by a thin metal foil.
4] The pair having identical value of e/m:
a) A proton and a neutron b) A proton and a deuterium ion
c) An ? -particle and a deuterium ion       d) an electron and ? -rays
5] The radius of an atomic nucleus is of the order of
a) 10
-10
m b) 10
-13
m c) 10
-15
m d) 10
-8
 m
6] An isotope of is:
76
32
Ge 
a)
76
32
Ge b)
77
33
As c)
77
34
Se d)
78
34
Se 
7] When alpha particles are sent through a thin metal foil, most of them go straight
through the foil because:
a) alpha particles are positively charged b)most part of the atom is empty space
c) alpha particle move with high velocity d) none of these
8] Rutherford’s experiment on scattering of a-particles showed for the first time that the
atom has
a) electrons b) protons c) nucleus d) neutrons
9] All type of electromagnetic radiation possess same
a) Wave length b) frequency
c) energy d) Velocity when they passed through vacuum
10] The radiation having maximum wave length is
a) ultra violet rays b) radio waves c) X-rays d) Infrared rays
11] The wavelength of two different radiations is 3000Å and 5000Å. The ratio of their
frequency.
a) 3 : 5 b) 5 : 3 c) 9 : 25 d) 25 : 9
LEARNERS HABITAT
LH Practice Sheet ATOMIC STRUCTURE
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in
 
Page 1
Page 2


1] According to Moseley the relationship between the frequency (v) of lines in X-rays
spectra and atomic number (Z) of an element is given by the expression
a) v = az - b b) z = a (v - b) c) z = a (v - b) d) v = a (z - b)
2] The increasing order of specific charge of electron (e) proton (P), alpha particle ( ? ) and
neutron (n) is
a) e, P, n, ? b) n, P, e, ? c) n, ? , P, e d) n, P, ? , e
3] The experimental evidence for the existence of atomic nucleus comes from
a) Millikan’s oil drop method b) Atomic absorption spectroscopy
c) The magnetic bending of cathode rays d) Alpha scattering by a thin metal foil.
4] The pair having identical value of e/m:
a) A proton and a neutron b) A proton and a deuterium ion
c) An ? -particle and a deuterium ion       d) an electron and ? -rays
5] The radius of an atomic nucleus is of the order of
a) 10
-10
m b) 10
-13
m c) 10
-15
m d) 10
-8
 m
6] An isotope of is:
76
32
Ge 
a)
76
32
Ge b)
77
33
As c)
77
34
Se d)
78
34
Se 
7] When alpha particles are sent through a thin metal foil, most of them go straight
through the foil because:
a) alpha particles are positively charged b)most part of the atom is empty space
c) alpha particle move with high velocity d) none of these
8] Rutherford’s experiment on scattering of a-particles showed for the first time that the
atom has
a) electrons b) protons c) nucleus d) neutrons
9] All type of electromagnetic radiation possess same
a) Wave length b) frequency
c) energy d) Velocity when they passed through vacuum
10] The radiation having maximum wave length is
a) ultra violet rays b) radio waves c) X-rays d) Infrared rays
11] The wavelength of two different radiations is 3000Å and 5000Å. The ratio of their
frequency.
a) 3 : 5 b) 5 : 3 c) 9 : 25 d) 25 : 9
LEARNERS HABITAT
LH Practice Sheet ATOMIC STRUCTURE
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in
 
Page 1
12] Which of the following relates to photon both as wave motion and as a  stream of
particles?
a) Interference b) E = mc
2
c) Diffraction d) E = hv
13] The source of ultra violet radiation is
a) hydrogen vapour lamp b) tungsten filament lamp
c) radioactive decay d) rare earth oxides are
heated at high temperature
14] What is the wave number for light with a wavelength of 4000 Å?
a) 2.5 x 10
4
 cm b) 5 x 10
16 
cm c) 7.5 x 10
4
 cm d) 8.5 x 10
4
 cm
15] The frequency of a wave of light is 1.0 x 10
6
 sec
-1
. The wave length for this wave is
a) 3 x  10
4
 cm b) 3 x 10
-4 
cm c) 6 x 10
4
 cm d) 6 x10
6
 cm
16] If ?v,?x and 
m
? represent the wavelength of visible light, X-ray and  microwave
respectively, then:
a)
m
? >?v>
x
? b)
m x v
? ? ? ? ? c)
v m x
? ? ? ? ? d)
v x m
? ? ? ? ?
17] Which of the following does not characterize X-rays?
a) The radiation can ionize gases b) It causes ZnS to show fluorescence
c) Defected by electric or magnetic field d) Have wavelength shorter than the UV rays
18] Transition of an electron from n = 3 level to n = 1 level results in
a) X -ray spectrum b) Emission spectrum
c) Band spectrum d) IR spectrum
19] Which of the following transition corresponds to 3rd line in visible region?
a) n = 3 to n =  2 b) n = 4 to n = 2
c) n = 5 to n = 2 d) n = 6 to n =3
20] What will be the number of total no. of spectral lines obtained when a electron of H-
atom jumps from its fifth excited state to its ground state?
a) 10 b) 15 c) 21 d) 6
21] The spectrum of He is expected to be similar to that of
a) H b) Na c) He
+
d) Li
+
22] The wavelength of a spectral line for an electronic transition is inversely related to
a) The number of electrons undergoing the transition
b) The nuclear charge of the atom
c) The difference of the energy of the energy levels involved in the transition
d) The velocity of the electron undergoing the transition.
LH Practice Sheet ATOMIC STRUCTURE
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in
 
Page 2
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