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Hydrogen is not obtained when zinc react...

Hydrogen is not obtained when zinc reacts with

A

Cold water

B

Dilute `H_(2)SO_(4)`

C

Dilute HCl

D

Hot `20% NaOH`

Text Solution

Verified by Experts

The correct Answer is:
A
Zn does not react with cold water. However it reacts with hot water and yield `H_(2)`
`Zn+H_(2)Ooverset("boil")rarrZnO+H_(2)`
`Zn+H_(2)SO_(4)(dil)rarrZnSO_(4)+H_(2)`
`Zn+2HCl(dil)rarrZnCl_(2)+H_(2)`
`Zn+underset(20%)(2NaOH)overset("heat")rarrNa_(2)ZnO_(2)+H_(2)`
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