Q.1
What are the possible values of the magnetic quantum number for an electron in aorbital?
  • -3, -2, -1, 0, +1, +2, +3
  • -2, -1, 0, +1, +2
  • -1, 0, +1
  • 0
Q.2
Which spectra is known as fingerprint spectra?
  • Continuous emission spectra
  • Line emission spectra
  • Absorption spectra
  • All of above
Q.3
In photoelectric effect, the kinetic energy of the photoelectrons increases linearly with the
  • Wavelength of incident light
  • Frequency of incident light
  • Velocity of incident light
  • Atomic mass of the element
Q.4
The spectral line in hydrogen spectrum obtained when the electron jumps from n=5 to n=2 energy level belongs to:
  • Lyman series
  • Balmer series
  • Paschen series
  • Pfund series
Q.5
Which element hasprotons ?
  • Gallium
  • Germanium
  • Gadolinium
  • Polonium
Q.6
The center of an atom that holds protons and neutrons?
  • model
  • electron
  • nucleus
  • neutron
Q.7
A proton has this charge
  • negative
  • positive
  • neutral
  • None of these
Q.8
Uncertainity in the position of an electron (mass= 9.1 x 10-kg) moving with a velocitym/s, accurate upto 0.will be
  • 1.92 x 10⁻² m
  • 3.84 x 10⁻² m
  • 19.2 x 10⁻² m
  • 5.76 x 10⁻² m
Q.9
The correct electronic configuration of Cr (Z=is
  • [Ar] 3d 5 4s 1
  • [Ar] 3d 4 4s 2
  • [Ar] 3d 9 4s 2
  • [Ar] 3d 10 4s 1
Q.10
The correct set of four quantum numbers for the balance electron of rubidium atom(z=is
  • 5, 1, 1, +1/2
  • 6, 0, 0, +1/2
  • 5, 0, 0, +1/2
  • 5, 1, 0, -1/2
0 h : 0 m : 1 s