Question

Boiling of a liquid takes place at

A. A fixed temperature lower than its boiling point.

B. A fixed temperature and normal atmospheric pressure. 

C. A fixed temperature higher than its boiling point. 

D. A fixed temperature and higher atmospheric pressure.

Answer 1

A liquid starts to boil at the boiling point. Boiling point is the temperature at which the liquid starts changing to gas at atmospheric pressure. So the conditions for boiling are fixed temperature and normal atmospheric pressure.