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Question

Which one of the following acid possesses oxidising, reducing and complex forming properties?

A
HNO3
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B
HCI
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C
H2SO4
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D
HNO2
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Solution

The correct option is D HNO2
In HNO2, N is not in highest oxidation state so it can work as oxidising as well as reducing agent.
Also HNO2 is an acid, which forms complex.

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