Exams › NEET › Chemistry

The hydride ion, H-, is a stronger base than the hydroxide ion, OH-. Which one of the following reactions will occur if sodium hydride (NaH) is dissolved in water?

1. H- (aq) + H2O(l) → H3O+ (aq)
2. H- (aq) + H2O(l) → OH- (aq) + H2 (g)
3. H- (aq) + H2O(l) →
4. H- (aq) + 2H+ (aq) + 2e- → OH- (aq) + reaction

Correct answer: H- (aq) + H2O(l) → OH- (aq) + H2 (g)

Solution

The hydride ion (H-) reacts with water to form hydroxide ion (OH-) and hydrogen gas (H2) because H- is a strong base and readily donates electrons to water.

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