What is the function of a catalyst in a chemical reaction?

The tendency to give up electrons is called-

The catalyst is a substance through which the rates of chemical reactions ________.

A radio-active substance has a half life of six months. Three-fourth of the substance will decay in____.

In which process is a protective zinc coating applied on iron to prevent it from rusting?

Nowadays yellow lamps are being used in abundance in street lights. Which of the following gas are used in these lamps?

Which of the following has the least melting point?

Water in case of HCl acts as a/an ___________, in case of ammonia acts as a/an ________