Four set-ups as given below are arranged to identify the gas evolved when dilute hydrochloric acid was added to zinc granules. Which is the most appropriate setup?(a) I(b) II(c) IV(d) III."
Correct answer: (c) 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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