If p is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength λ, then for 1.5 p momentum of the photoelectron, the wavelength of the light should be: (Assume kinetic energy of ejected photoelectron to be very high in comparison to work function) :
Among the following, the molecule expected to be stabilized by anion formation is:
C2, O2, NO and F2
NO
C2
F2
O2
B.
C2
In case of C2, incoming electron will enter in the bonding molecular orbital which increases the bond order and stability too. Whereas all the other options takes electron in their antibonding molecular orbital which decreases bond order and stability.
For any given series of spectral lines of atomic hydrogen, let be the difference in maximum and minimum frequencies in cm-1. The ratio is:
4 : 1
9 : 4
5 : 4
27.5
The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about 9. The spectral series are:
Paschen and Pfund
Lyman and Paschen
Brackett and Pfund
Balmer and Brackett