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Solution


Q.

Assertion: Plaster of Paris should be stored in dry place.

Reason: To prevent its reaction with moisture.
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)

Plaster of Paris is stored in a dry place because in the presence of water or moisture, it changes to a hard solid mass called gypsum