First slide

Hydrogen

Question

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

Moderate

A

1 : 1
B

1 : 2
C

2 : 1
D

9 : 4

Solution

$Zn + H_{2} {SO}_{4} \to {ZnSO}_{4} + H_{2} Zn + 2 NaOH \to {Na}_{2} {ZnO}_{2} + H_{2} ∴ Ratio of volumes of H_{2} evolved is 1 : 1$

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