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Question

By what unit the oxidation number changes for underline elements in the following reaction-

Zn + HNO3 NH4NO3 + Zn (NO3)2 + H2O


A

4 units

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B

2 units

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C

6 units

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D

8 units

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Solution

The correct option is D

8 units


In HNO3 the oxidation state of N is +5 and the oxidation number of N is -3 in NH4NO3 hence there is change in oxidation number by 8 units.


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