" Laughing gas is prepared by heating; "

The laughing gas is

The laughing gas is

Laughing gas is obtained by heating of………….

The laughing gas

Laughing gas is obtained on heating a mixture of NH_4Cl and ......... but nitrogen gas is obtained when a mixture of NH_4Cl and .............. is heated.

HBr//HI are prepared by heating

Dihydrogen gas may be prepared by heating caustic soda on