Assertion : $P_{4}$ exists but $N_{4}$ does not exist. Reason: In $P_{4}$ form P-atoms are joined by single bonds while in $N_{4}$ , two, N-atoms are joined by double and other two by single bonds.

Read the above assertion and reason and choose the correct option regarding it.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
$P_{4}$ exists but $N_{4}$ does not exist.
Nitrogen exists as diatomic molecule $N_{2}$ in which two N atoms are bonded by a tripple bond. Nitrogen can form $p π - p π$ multiple bonds but P cannot form $p π - p π$ multiple bonds. Hence, phosphorious forms discrete tetrahedral, tetra atomic $P_{4}$ molecules.
Hence, assertion is correct but reason is incorrect.

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