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Phosphorus is in the same group of the Mendeleev’s periodic table as nitrogen. What is the formula of the compound containing only phosphorus and hydrogen?

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PH₂

PH₃

PH₅

answer is C.

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Detailed Solution

The valency of hydrogen is 1 and Phosphorus is present in V group of Mendeleev’s table
hence the formula is .PH₃

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