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.	Calcium carbonate	_________	_________
2.	Magnesium ribbon	_________	_________
3.	Manganese (IV) oxide with heating	_________	_________
4.	Sodium sulphide	_________	_________

Answer 1

S. No.	Substances added	Gas evolved	Odour
1.	Calcium carbonate	\[\ce{CO2}\]	Odourless
2.	Magnesium ribbon	\[\ce{H2}\]	Odourless
3.	Manganese (IV) oxide with heating	\[\ce{Cl2}\]	Strong Pungent odour
4.	Sodium sulphide	\[\ce{H2S}\]	Unpleasant like