What is the orbital angular momentum of an electron in 3s orbital ?
Zero
h/2π
√2 h/2π
None of these
What is the de Broglie wave length, for particles having same kinetic energy?
Directly proportional to its velocity
Inversely proportional to its velocity
Independent of velocity and mass
Meaningless
Isotones are nuclei having
Same atomic numbers
Same mass number
Same number of protons
Same number of neutrons
Where does the cathode rays get deflected ?
A magnetic field only
An electric field only
Both electric and magnetic field
Which among the following solids have low melting points?
Hydrogen bonded molecular solids
Ionic solids
Polar molecular solids
Non-polar molecular solids
No two electrons in an atom can have the same set of four quantum number. This is the statement of
Pauli's exclusion principle
Hund's rule
Aufbau principle
What is the uncertainty in the position of a particle when the uncertainty in momentum is zero ?
6.626 × 10-34
4.14 × 10-35
Infinity
A wide variety of crystalline solids containing covalent bonds are called
Covalent solids
Molecular solids
Metallic solids
Which orbital have zero electron density in xy plane ?
pz
dz2
dxy
dx2 - y2
