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Question

Identify X in the following reaction:
HCl + X NaCl + H2CO3
H2CO3 H2O + CO2


A

NaHCO3

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B

NaOH

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C

Na2CO3

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D

None of these

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Solution

The correct option is A

NaHCO3


It is an acid neutralization reaction by a bicarbonate antacid.
HCl + NaHCO3 NaCl + H2CO3

Even Na2CO3 reacts with HCl forming the same product, but Na2CO3 requires 2HCl molecules.

2HCl + Na2CO3 2NaCl + H2CO3

So, the correct option is NaHCO3


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