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Which of the following evolve hydrogen o...

Which of the following evolve hydrogen on reacting with cold dilute nitric acid ?

A

Iron and `H_(2)SO_(4)` (aqueous)

B

Iron and steam

C

Copper and HCl (aqueous)

D

Sodium and ethyl alcohol

Text Solution

Verified by Experts

The correct Answer is:
C
`Fe+"dil. "H_(2)SO_(4)rarr FeSO_(4)+H_(2)uarr`
`3Fe+underset("Steam")(4H_(2)O)rarr Fe_(3)O_(4)+4H_(2)uarr`
`Cu+"dil. "HC lrarr"No reaction"`
Copper does not evolve `H_(2)` from acid as it is below hydrogen in electrochemical series.
`2Na+2C_(2)H_(5)OHrarr 2C_(2)H_(5)ON a+H_(2)uarr`
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