Assertion :Aqueous solution of $C H_{3} C O O N H_{4}$ is exactly neutral. $(K_{a} = K_{b})$ Reason: $C H_{3} C O O N H_{4}$ is a salt of weak acid and strong base.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
As $K_{a} = K_{B}$ for Acid $C H_{3} C O O H$ and Base $N H_{4} O H .$
$C H_{3} C O O N H_{4} + H_{2} O \to C H_{3} C O O H + N H_{4} O H$
And no $H^{+} o r O H^{-}$ is formed
Hence it is neutral.
$C H_{3} C O O N H_{4}$ is a salt of weak acid and weak base.

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Assertion :Aqueous solution of CH3COONH4 is exactly neutral.(Ka=Kb) Reason: CH3COONH4 is a salt of weak acid and strong base.

The correct option is C Assertion is correct but Reason is incorrectAs Ka=KB for Acid CH3COOH and Base NH4OH.CH3COONH4+H2O→CH3COOH+NH4OHAnd no H+ or OH− is formedHence it is neutral.CH3COONH4 is a salt of weak acid and weak base.

Assertion :Aqueous solution of $C H_{3} C O O N H_{4}$ is exactly neutral. $(K_{a} = K_{b})$ Reason: $C H_{3} C O O N H_{4}$ is a salt of weak acid and strong base.