An electronic transition in hydrogen atom results in the formation of Hα line of hydrogen in Lyman series, the energies associated with the electron in each of the orbits involved in the transition (in kcal mol-1) are
-313,6, - 34.84
-313.6, - 78.4
-78.4,- 34.84
-78.4,-19.6
The velocities of two particles A and B are 0.05 and 0.02 ms-1 respectively. The mass of B is five times the mass of A. The ratio of their de-Broglie's wavelength is
2 : 1
1 : 4
1 : 1
4 : 1
The wavelengths of electron waves in two orbits is 3 : 5. The ratio of kinetic energy of electrons will be
25 : 9
5 : 3
9 : 25
3 : 5
Which one of the following conditions is incorrect for a well behaved wave function (Ψ)?
Ψ must be fine
Ψ must be single valued
Ψ must be infinite
Ψ must be continuous
Which one of the following frequencies of radiation (in Hz) has a wavelength of 600 nm?
2.0 × 1013
5.0 × 1016
2.0 × 1014
5.0 × 1014
According to Bohr's theory which one of the following values of angular momentum of hydrogen atom is not permitted?
The quantum number which explains the line spectra observed as doublets in case of hydrogen and alkali metals and doublets and triplets in case of alkaline earth metals is
spin
azimuthal
magnetic
principal
A compound absorbs light in the wavelength region 490-500 nm. Its complementary colour is
red
blue
orange
blue-green
Which of the following sets of quantum numbers is correct for an electron in 3d-orbital?
n = 3; l = 2; m = -3; s = +
n = 3; l = 3; m = +3; s = -
n = 3; l = 2; m = -2; s = +
n = 3; l = 2; m = -3; s = -