1.

Assertion (A ) : The degree of ionization of water is small at 25^(@)C , only aboutone of every 10^(7) molecules in pure water is ionized at any instant Reason (R ) : In pure water at 25^(@)Cthe molar concentration of water is essentially constant.

Answer»

Both A and R TRUE and R is the CORRECT explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is FALSE
A is false but R is true

Answer :B


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