The most dangerous method of preparing hydrogen would be by the action of $HCl$ and

On heating a mixture of $NH_4Cl$ and $KNO_2$,we get:

The charring of sugar takes place when treated with concentrated $H_2SO_4$. What is the type of reaction involved in it?

Sodium forms a crystalline ionic solid with dihydrogen. The solid is non-volatile and non-conducting in nature. It reacts violently with water to produce dihydrogen gas. Write the formula of this compound and its reaction with water. What will happen on electrolysis of the melt of this solid?

Which element forms the maximum number of compounds in chemistry?

Commercially,methanol is prepared by: