Four set ups as given here were arranged to identify the gas evolved when dilute sulphuric 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 sulphuric 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:
$Zn(s) + 2H_2SO_4 (aq) → ZnSO_4 (aq) + H_2(g)$
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(1) I (2) II (3) III (4) IV"
