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  • 5 g of zinc is treated separately with an excess of (a) dilute hydrochloric acid and (b) aqueous sodium hydroxide The ratio of the volumes of <img alt="H_{2}" src="htt

5 g of zinc is treated separately with an excess of

(a) dilute hydrochloric acid and

(b) aqueous sodium hydroxide

The ratio of the volumes of H_{2} evolved in these two reactions is :

Option: 1

1:2


Option: 2

1:4


Option: 3

1:1

 


Option: 4

2:1


Answers (1)

best_answer

\\\( \mathrm{Zn}+2 \mathrm{NaOH} \longrightarrow \mathrm{Na}_{2} \mathrm{ZnO}_{2}+\mathrm{H}_{2} \) \\\( \mathrm{Zn}+2 \mathrm{HCl} \longrightarrow \mathrm{ZnCl}_{2}+\mathrm{H}_{2} \)

According to stoichiometry in both the reactions, an equal number of moles of H2 are evolved.

Hence, the Option number (3) is correct.

Posted by

Ajit Kumar Dubey

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