Assertion : $N H_{4} H C O_{3}$ exists in solid state. Reason: Alkali metals form solid bicarbonates.

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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Because group 1 metals are so strongly basic, they (except lithium) also form solid bicarbonates. No other metals form solid bicarbonate. Lithium carbonate is not so stable to heat. Its hydrogen carbonate does not exist as a solid. $N H_{4} H C O_{3}$ also exists as a solid. The crystal structures of $N a H C O_{3}$ and $K H C O_{3}$ both show hydrogen bonding but are different.
Thus, Both assertion and reason are true but the reason is not the correct explanation of assertion.

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