Assertion : Weak acids have very strong conjugate bases while strong acids have weak conjugate bases.
Reason : Conjugate acid-base pair differ only by one proton.

Options

A. If both (A) and (R) are correct and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct, but(R) is not the correct explanation of (A)
C. If(A) is correct, but (R) is incorrect
D. If both (A) and (R) are incorrect

Answer

B

Explanation

B Strong acids such as perchloric acid `(HCIO_(4)),` hydrochloric acid (HCI) give conjugate base ions `CIO_(4) ^(-)`
` Cl^(-)` which are much weaker bases than `H _(2)O.` On the other hand, a weak acid like acetic acid is only partially dissociated in aqueous medium and thus the solution mainly contains undissociated acetic acid which proves that `CH_(3) COO` is stronger base than `H _(2)O.`