Assertion: zinc fails to evolve hydrogen gas on reacting with dilute sulphuric acid.
Reason: It gives the NO gas on reaction with ammonia.
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Both Assertion and Reason are false
- When Zinc reacts with dilute sulphuric acid at room temperature it does liberates hydrogen gas.
- Whereas, when Zinc reacts with concentrated sulphuric acid it doesn't evolve hydrogen gas instead it gets reduced to Sulphur dioxide.
- So, the case is totally opposite. Hence, the given assertion is false.
- When Zinc reacts with ammonia gas it readily forms a complex ion called as tetrammine zinc(II) complex. It is a cationic complex with Zn having sp3 hybridization.
- In the formation of complex there's no evolution of NO gas. Hence, the reason is false too.
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