In a molecule, electrons are present in new orbitals called :
Molecular orbitals
Spherical orbital
Hexagonal orbital
None of these
A particle having a mass of 1.0 mg has a velocity of 3600 km/h. Calculate the wavelength of the particle.
(h=6.626 x 10-27 ergs)
6.626 x 10-28 cm
6.626 x 10-29 cm
6.626 x 10-30 cm
6.626 x 10-31 cm
The energy of electron in an atom is given by En = ___________.
de-Broglie relation has significance for ___________ object.
Submicroscopic
Macro
Large
Dual character of an electron was explained by
Bohr
Heisenberg
de-Broglie
Pauli
p-orbitals have the shape :
Spherical
Dumb-bell
Dough nut shape
Hexagonal
What is the frequency of a light wave whose period is 2.0 x 10-10 s ?
5 x 109 s
4 x 109 s
5 x 109 s-1
4 x 109 s-1
The bond order of O2 molecule can be calculated as :
2
3
1
1/2
Calculate the velocity of an electron having wavelength of 0.15 nm. Mass of an electron is 9.109 x 10-28 g. (h=6.626 x 10-27 ergs)
4.85 x 108 cms-1
2.062 x 10-15 cms-1
2.068 x 10-10 cms-1
4.85 x 10-8 cms-1
The charge on an electron was discovered by :
J.J. Thomson
Neil Bohr
James Chadwick
Millikan
