Question

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

• A. If both the assertion and reason are true and reason is the correct explanation of assertion.
• B. If both the assertion and reason are true but reason is not the correct explanation of assertion.
• C. If assertion is true but reason is false.
• D. If both assertion and reason are false.

Answer 1

The correct option is B If both the assertion and reason are true but reason is not the correct explanation of assertion.

Strong acids such as perchloric acid $\left(HCl{O}_4\right)$ hydrochloric acid (HCl) give conjugate base ions $Cl{O}_4^{-},C{l}^{-}$ 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 $C{H}_{3}CO{O}^{-}$ is stronger base than $H_{2}O$.