NCERT Class XI Chemistry Hydrogen Solutions

Question : 15

Total: 36

Saline hydrides are known to react with water violently producing fire. Can CO2, a well-known fire extinguisher, be used in this case? Explain.

Solution:

When saline hydrides react with water, the reaction is highly exothermic, the evolved hydrogen catches fire. e.g.,
NaH(s)+H2O(aq) → NaOH(aq)+H2(g) ↑ + heat
CO2 cannot be used in this case because it will react with hot metal hydride.
NaH + CO2 → HCOONa

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