Occurrence of hydrogen - class-XI

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Question 1 of 17

In which of the following reactions hydrogen gas is liberated ?

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$C{H _3}COOH + Na$

$C{H _3}COOH + NaHC{O _3}$

$C{H _3}COOH + NaOH$

$C{H _3}COOH + {H _2}O.$

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