Chemistry
Assertion (A) : Synthetic detergents can lather wen in hard water.Reason (R) : Synthetic detergents form soluble calcium and magnesium salts with hard water.

A is true but R is false
Both A and R is true but R is not a correct explanation of A
A is false but R is true
Both A and R is true and R is the correct explanation of A

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Chemistry
Kinetics is the study of:

All of these are correct
The rate of chemical reaction
The mechanisms and paths of the molecules take in joining from one reactant to products
How fast the reactions go

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