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Question

By the action of conc.HNO3 phosphorus changes to:

A
phosphorus acid
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B
metaphosphoric acid
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C
orthophosphoric acid
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D
pyrophosphoric acid
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Solution

The correct option is C orthophosphoric acid
By the action of conc.HNO3 phosphorus changes to orthophosphoric acid.
P4+20HNO34H3PO4+4H2O+20NO2

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