Assertion (A): Atomic number of sodium is 11.
Reason (R): Sodium has a body centred cubic lattice.
Answer: B
Atomic number is not dependent on lattice structure.
In paramagnetic materials
Answer: A
In paramagnetic materials interaction between neighbouring dipoles is negligible.
Above ferroelectric curie temperature, spontaneous polarization in ferroelectric materials becomes stronger.
Answer: B
Spontaneous polarization vanishes above ferro-electric Curie temperature.
Which capacitor-store higher amount of energy?
Answer: C
Energy stored is proportional to capacitance and capacitance is proportional to permittivity.
Diamond is a paramagnetic material.
Answer: B
Diamond is diamagnetic.