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13/12/2021 4:22 pm
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When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide solution the ratio of volumes of hydrogen evolved is
(a) 1 : 1
(b) 1 : 2
(c) 2 : 1
(d) 9 : 4
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13/12/2021 4:25 pm
Correct answer: (a) 1 : 1
Explanation:
Zn + H2SO4 → ZnSO4 + H2
Zn + 2NaOH → Na2ZnO2 + H2
∴ Ratio of volumes of H2 evolved is 1 : 1.