1.
Bohr model is valid for
2.
The angular momentum of an electron in Bohr’s second orbit is proportional to ___
4.
The first line of Lyman series corresponds to transition
5.
Which transition emits visible light?
6.
Which orbital has spherical symmetry?
7.
Magnetic quantum number determines ___
8.
Which subshell has highest energy?
9.
Ionisation enthalpy of He is high due to
10.
Energy of an electron varies inversely with ___ in Bohr’s model
11.
Which describes wave nature of electron?
12.
Principal quantum number determines
13.
Which emits IR radiation?
14.
The correct set of quantum numbers for the last electron of Cl (Z=17) is
15.
Which spectral line corresponds to the greatest energy difference?
16.
Electron affinity increases ___
17.
The orbital with highest penetration
18.
A neutron was discovered by ___
19.
Which has the smallest wavelength?
20.
Wave number is proportional to
21.
The ratio of velocities of electrons in n=1 and n=4 hydrogen orbits is
22.
In hydrogen, the wavelength of H-α is
23.
Which quantum number determines shape of orbital?
24.
The energy of a photon is proportional to
26.
The uncertainty principle is significant for ___
27.
The radius of second Bohr orbit of hydrogen (r₂) is
28.
The ratio of de Broglie wavelengths of electrons in n=1 and n=3 orbits of H-atom is:
29.
The nodal plane concept is applicable to
30.
Photoelectric effect proves ___
31.
If n=4, the number of possible electrons =
32.
The number of radial nodes in 3s =
33.
If an electron is in 3d orbital, the number of angular nodes =
34.
Which has maximum effective nuclear charge?
35.
The orbital degeneracy of f-subshell =
36.
Hund’s rule deals with
37.
Aufbau principle fails for
38.
Which has the highest penetration?
39.
Ionisation energy is lowest for
40.
The number of allowed m values for d-orbital is
41.
Which has the maximum number of orbitals?
42.
Rutherford model fails because it cannot explain ___
43.
The charge/mass ratio of electron was measured by
44.
The maximum electrons in n=4 shell =
45.
The number of radial nodes in 4p orbital is ___
