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ICSE Class 9 Chemistry Question 20 of 26

Study of the First Element — Hydrogen — Question 19

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19
Question

Question 1(1991)

How would you obtain 'hydrogen from sodium hydroxide' solution other than by electrolysis ?

Answer

When powdered zinc reacts with sodium hydroxide it produces hydrogen.

Zn+2NaOH⟶Na2ZnO2Sodium zincate+H2[g]\text{Zn} + 2\text{NaOH} \longrightarrow \underset{\text{Sodium zincate}}{\text{Na}_2\text{ZnO}_2} + \text{H}_2 \text{[g]}