Question

A solution of hydrogen chloride in water is prepared. The following substances are added to separate portions of the solution:

S.No.	Substances added	Gas evolved	Odour
1. 2. 3. 4.	Calcium carbonate Magnesium ribbon Manganese (IV) oxide with heating Sodium sulphide	___ ___ ___ ___	___ ___ ___ ___

Answer 1

A solution of hydrogen chloride with water is prepared. Then, the below mentioned substances are added to separate portions of the solution. The gases evolved, with their respective odour, are listed below:

S.No.	Substances added	Gas evolved	Odour
1.	Calcium carbonate	Carbon dioxide	No odour
2.	Magnesium ribbon	Hydrogen gas	No odour
3.	Manganese (IV) oxide (with heat)	Chlorine gas	Sharp pungent odour
4.	Sodium sulphide	Hydrogen sulphide	Rotten egg odour