Four set ups as given below were arranged to identify the gas evolved when dilute hydrochloric acid was added to zinc granules. The most appropriate set up is :

(1) I
(2) II
(3) III
(4) IV"

Correct answer: (4) IV

Explanation: When zinc is treated with dilute hydrochloric acid, hydrogen gas is liberated from the solution. Only from setup 4 hydrogen gas can be easily evolved.

The chemical equation for the reaction is given below:

$Zn(s) + 2HCl (aq) → ZnCl_2 (aq) + H_2(g)$

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Updated on: 10-Oct-2022

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