First slide

Hydrogen

Question

The reaction which does not liberate hydrogen is

Easy

A

Zn + NaOH →
B

Al + NaOH
C

F₂ + NaOH →
D

Both 1 and 2

Solution

Zn + 2NaOH → Na2ZnO2 + H2↑
2Al + 2NaOH + 2H2O → 2NaAlO₂ + 3H₂
2F₂ + 2NaOH cold.dil → 2NaF + OF₂ + H₂O

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