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Q.

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

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a

1 : 1

b

1 : 2

c

2 : 1

d

9 : 4

answer is A.

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Detailed Solution

Zn + H2SO4 →  ZnSO4 + H2 Zn + 2NaOH →  Na2ZnO2 + H2 ∴    Ratio of volumes of H2 evolved is 1 : 1
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