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Question

Which of the given dilute acids react with bleaching powder to release chlorine gas?


Correct Answer
A
Sulphuric acid
Your Answer
B
Nitric acid
Correct Answer
C
Hydrochloric acid
Your Answer
D
Acetic acid

Solution

The correct options are
A Sulphuric acid
C Hydrochloric acid
The chemical formula of bleaching powder is CaOCl2. When dilute sulphuric acid and dilute hydrochloric acid are added to it, it reacts completely with them to release chlorine gas as shown below:
CaOCl2(s) + H2SO4(aq) CaSO4(s)+ Cl2(g)+ H2O(l)CaOCl2(s) +2HCl(aq)CaCl2(s)+ Cl2(g)+ H2O(l)

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