The number of atoms contained in a fcc unit cell of a mono atomic substance is:

With which one of the following elements  should silicon be doped so as to give p - type of semiconductor? 

Root mean square velocity of a gas molecule is proportional to:

When electrons are trapped into the crystalline anion vacancy, the defect is known as:

On doping Ge metal with a little of In or Ga, one gets:

Zn converts from its melted state  to its solid state. It has HCP structure. Then find out the number of nearest atoms. 

Pressure remaining the same, the volume of a given mass of an ideal gas increases for every degree centigrade rise in temperature by definite fraction of its volume at:

Which among the following is a solid with high electrical and thermal conductivity?

The beans are cooked earlier in pressure cooker because:

If a gas expands at constant temperature, it indicates that: