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."

AcademicChemistryNCERTClass 10

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:

$Zn(s) + 2HCl (aq) → ZnCl_2 (aq) + H_2(g)$
Updated on 10-Oct-2022 12:46:47