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Solution


Q.

Assertion: Curd and sour substances should not be stored in copper vessels.

Reason: Curd and other sour substances should not be kept in brass and copper vessels as they contain acids.
1 Both assertion and reason are correct and reason is the correct explanation of assertion.  
2 Both assertion and reason are correct but reason is not the correct explanation of assertion.  
3 Assertion is true, but reason is false.  
4 Assertion is false, but reason is true  

Ans.

(1)

Curd and other sour substances should not be kept in brass and copper vessels as they contain acids. When these substances are kept in brass and copper vessels, the metal reacts with the acid to liberate hydrogen gas and harmful products are obtained due to which the food gets spoiled.