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  4. Dihydrogen is prepared by the reaction of Zn with (a q) NaOH. Which of the following compounds is produced with dihydrogen during the course of reaction?

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Q. Dihydrogen is prepared by the reaction of $Zn$ with $(a q) NaOH$. Which of the following compounds is produced with dihydrogen during the course of reaction?

Hydrogen

Solution:

The reaction between $Zn$ and $NaOH$ is shown below :
$Zn +2 NaOH (a q) \longrightarrow \underset{\text{Sodium zincate}}{Na _{2} ZnO _{2}}+\underset{\text{Dihydrogen}}{ H _{2} \uparrow}$
Thus, sodium zincate is produced in the reaction.