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If in a reaction HNO3 is reduced to NO, ...

If in a reaction `HNO_3` is reduced to NO, the mass of `HNO_3` absorbing one mole of electrons would be

A

`21.0`

B

`63.0`

C

`42.0`

D

`31.5`

Text Solution

Verified by Experts

The correct Answer is:
A
` overset(+5) (HNO_3) to overset(+2)(NO)`
Mass of `HNO_3` absorbing one mole of electron i.e.,
Equivalent mass =` ( " Molecular weight")/(" Change in oxidation number") = 63//3 =21`
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