Assertion (A): Powdered calcium carbonate reacts much faster with dilute HCL than with the same mass of CaCO3 as marble.
Reason (R): For a given mass of a reactant, when the particle size decreases, surface area increases. Increase in surface area of the reactant leads to more collisions per litre per second and hence the rate of the reaction also increases.
(a) Both A and R are correct and R is the correct explanation of A.
(b) Both A and R arc correct but R is not correct explanation of A
(c) A is correct but R is wrong
(d) A is wrong but R is correct
