1.

Assertion (A): Powered calcium carbonate reacts much faster with dilute HCI then with the same mass of CaCO_3as marble. Reason : For a given mass of a reactant , when the particle size decrease, surface area increases Increase in surface area of the reaction leads to more Collisions per litre per second and hence the rate of the reaction also increase

Answer»

Both A and R are CORRECT and R is the correct EXPLANATION of A
Both A and R are correct but R is not the correct explanation of A
A is correct but R is WRONG
A is wrong but R is correct

ANSWER :a


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