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Question

Assertion : $$HCO_3^-$$ can act as a Bronsted acid or a Bronsted base.
Reason : $$HCO_3^-$$ can donate a proton to form $$CO_3^{2-}$$ or accept a proton to form $$H_2CO_3$$.


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

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
A Bronsted acid donates a proton and a Bronsted base accepts a proton.
$$HCO_3^-+H^+\longrightarrow H_2CO_3$$  Bronsted base
$$HCO_3^-\longrightarrow CO_3^{2-}+H^+$$  Bronsted acid
Since, $$HCO_3^-$$ can donate a proton to form $$CO_3^{2-}$$ and can accept a proton to form $$H_2CO_3$$, it can act as a Bronsted acid as well as a Bronsted base. Hence both assertion and reason are correct and reason is the correct explanation for assertion.

Chemistry

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