Question

Assertion :$KOH$ is more soluble in water than $NaOH$ Reason: $NaOH$ is a stronger base than $KOH$

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is C Assertion is correct but Reason is incorrect

The ionic size of $N{a}^{+}$ is smaller than $K^{+}$. Hence, attractive force between $N{a}^{+}$ and $O{H}^{-}$ is relatively strong and so ionisation of $NaOH$ is lower than $KOH$ which makes $NaOH$ a weaker base than $KOH$.