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ICSE Class 10 Chemistry 2022 Paper

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SECTION - I
Choose the correct answers to the questions from the given options.
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Question : 5 of 55
Marks: +1, -0
The gas formed, when calcium bisulphite reacts with dilute HNO3\mathrm{HNO}_3 :
Solution:  
(c) Sulphur dioxide
Explanation :
Metallic Bisulphite on reaction with nitric acid gives metallic nitrates, water and sulphur dioxide gas.
Ca(HSO3)2+2HNO3→Ca(NO3)2\mathrm{Ca}(\mathrm{HSO}_3)_2+2\mathrm{HNO}_3\rightarrow\mathrm{Ca}(\mathrm{NO}_3)_2 +2H2O+2SO2(g)+2\mathrm{H}_2\mathrm{O}+2\mathrm{SO}_2(\mathrm{g})
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