Test Session 8
Mcqs With Key
Mcqs
1) Number of MCQs*30 per test
2) TEST TIMING
08:00pm to 09:00pm
3) TEST DATE
17/12/2021
4) TEST SUBJECT
Chemistry
*5) CHAPTER NAME
Atomic Structure
6) TEST PREPARED BY
Sonia Rao
Hamza Kamal
Istihar Khan
Lubna. Shafiq
Sidratul Muntaha
Mcqs
1 ) How many times the mass of neutron is greater than mass of electron.a)1480 b) 2000
c) 1840 d) 1200
2) Lyman series is found in.
a) UV series
b) visible region
c) IR regions
d) microwave region
3) The ion that is iso-electronic with CL atom is
a)CN¯ b) N2+
c) O2+ d) O2¯
4) identify the correct order of decreasing energy
a) 3s>2s>1s
b)2s>3s>1s
c)1s>2s>3s
d) 1s>3s>2s
5) Which of the following has highest ionisation energy value
a) Li b) H
c) Be d) He
*6) The number of neutron in K is
a) 39 b) 18
c)20 d) 19
7) The three dimensional space around the neucleus within which the probabilty of finding elecrtron is maximum is called.....
A)shells
B)orbitalls
c)neucleus
D)all of them
8) The number of orbitals in 'M' shell of an atom...
A)1
B)4
C)5
D)9
9) Shap of 'd' orbital is.....
A)spherical
B)dumb-bell
C)double
D)none
10) The electronic configuration of gallium atomic number 31 is
A) [Ar]4s2 3d10 4p1
B) [Ar]3s2 3d10 4p1
C) [Kr]3s2 3d10 4p1
D)none of the above
11) If value of azimuthal quantumber is 3 then what will be the subshell
A)s
B)p
C)d
D)f
12) d-subshell can accomodate how much electrons.....
A)2
B)6
C)10
D)14
13) Which of the following quantum number give information about number of orbitals in a sub shell.....
a) spin quantum number
b) principal quantum number
c) magnetic quantum number
d) azimuthal quantum number
14) Total number of orbitals in d- sub shell...
a)1
b)3
c)5
d)7
15) when electron is excited from k shell to L shell of hydrogen atom then the radius of the atom is
a) 0.529A.
b) 1.058A
c) 2.116 A
d) 1.587A
16) A photon having energy 6.62×10^4 j
what is the wave number of that photon.
a) 3.33×10^30m^-1
b) 6.62×10^30m^-1
c) 3.33×10^29m^-1
d) 6.62×10^34m^-1
17) If the wavelength of the radiation is decreased by 2/3 times the energy of the photon.
a )increases by 3 times
b)increases by 2 times
c)increases by 1/3 times
d)increases by 3/2times
18) According to bohr model separation b/w second and fourth orbit of hydrogen is
a)2.64 A
b)8.465A
c)3.7A
d)6.344A
19) Bohor model is applicable for
a ) He+
b) Li+
c) B+3
d)Be+2
20) Three quantum number have been derived from equation of
a) de Broglie
b) Planck's c) schrodinger
d) Heisenberg
21) Centrifugal forces are balanced in atom by a) attractive force
b) repulsive force
c) electron d) neutron
22) Quantum number which tells the energy of electron is
a) n b) l
c) m d) s
23) Charge of electron was measured by
a) J.J Thomson
b) Milikan
c) Rutherford
d) Perrin
24) Pressure in gas discharge tube was kept
a) 10 Torr
b) 1 Torr
c) 0.1 Torr
d) 0.01 Torr
25) A fast moving neutron can eject from nitrogen
a) Gama rays
b) alpha rays
c) beta rays
d) electron.
26) Azimuth quantum number is also known as -------
a) perpendicular quantum number
b) angular quantum number
c)translatory quantum number
d)none of the above
27) Azimuthal quantum number expresses the energies of subshells in the order of;
a) s less than p less than d less than f
b) s greater p greater d greater f
c) s greater d greater p greater f
d) both a and b
*28)*Which quantum number gives number of permitted orientation of subshells;
a) principal quantum number
b) azimuthal quantum number
c) magnetic quantum number
d)spin quantum number
29) The size and energy of s orbital with increasing n will be;
a)1s> 2s> 3s> 4s
b)1s < 2s < 3s< 4s
c)3s> 2s >1s >4s
d) both a and b
30) For which orbital l=3 and m are -3, -2, 1, 0, +1, +2, +3;
a) p orbital
b) d orbital
c) f orbital
d) s orbital
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