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
Zero
Infinity
A wide variety of crystalline solids containing covalent bonds are called
Ionic solids
Covalent solids
Molecular solids
Metallic 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
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
What is the orbital angular momentum of an electron in 3s orbital ?
h/2π
√2 h/2π
Isotones are nuclei having
Same atomic numbers
Same mass number
Same number of protons
Same number of neutrons
Which orbital have zero electron density in xy plane ?
pz
dz2
dxy
dx2 - y2
Which among the following solids have low melting points?
Hydrogen bonded molecular solids
Polar molecular solids
Non-polar molecular solids
Where does the cathode rays get deflected ?
A magnetic field only
An electric field only
Both electric and magnetic field
