In a molecule, electrons are present in new orbitals called :
Molecular orbitals
Spherical orbital
Hexagonal orbital
None of these
The energy of electron in an atom is given by En = ___________.
Dual character of an electron was explained by
Bohr
Heisenberg
de-Broglie
Pauli
de-Broglie relation has significance for ___________ object.
Submicroscopic
Macro
Large
The bond order of O2 molecule can be calculated as :
2
3
1
1/2
Which of the following transitions have minimum wavelength ?
n4 → n1
n2 → n1
n4 → n2
n3 → n1
The relation between wave motion of photons and stream of particle is :
Interference
E = mc2
Diffraction
E = hν
It is impossible to determine simultaneously by both the position and velocity of a microscopic particle with absolute accuracy or certainty. This is :
Heisenberg uncertainty principle
de-Broglie's principle
Bohr's principle
Quantum theory
Shape of s-orbital is :
Dumb-bell
Spherical
Hexagonal
Tetrahedral
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