Question

15. A solution of hydrogen chloride in water is prepare
The following substances are added to separate portions
of the solution :
Gas evolved
Odour
S. No. Substances added
1. Calcium carbonate
2. Magnesium ribbon
Manganese (IV)
oxide with heating
Sodium sulphide
ico
Complete the table by writing the gas evolved in each
case and its odour.

Answer 1

Answer:

Substance Added                   Gas Evolved    odour                        

Calcium Carbonate        Carbon dioxide                    Odourless

Magnesium ribbon           Hydrogen                            Odourless

Manganese(IV) oxide             with heating          Chlorine Strong pungent

Sodium sulphide            Hydrogen sulphide               Rotten egg odour

Answer 2

Answer:

1. Calcium carbonate;

Gas evolved- carbon dioxide

Odour- odourless

2. Magnesium ribbon;

Gas evolved- hydrogen

Odour- odourless

3. Manganese (IV)  oxide with heating;

Gas evolved- chlorine

Odour- pungent

4. Sodium sulphide;

Gas evolved- hydrogen sulphide

Odour- rotten egg smell

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