Assertion : $P C l_{4}$ exists but $N C l_{5}$ does not exist. Reason: $d -$ orbital in $P -$ atom takes part in chemical bonding, this lacks in $N -$ atom.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The electronic configuration of Phosphorous is: $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{3} 3 d^{0}$ .
The electronic configuration of Nitrogen is: $1 s^{2} 2 s^{2} 2 p^{3}$
Therefore, ${P C l}_{5}$ can be formed but not $N C l_{5}$ due to the unavailability of $2 d$ orbital.

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Similar questions

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Assertion :PCl4 exists but NCl5 does not exist. Reason: d− orbital in P−atom takes part in chemical bonding, this lacks in N− atom.

Assertion : $P C l_{4}$ exists but $N C l_{5}$ does not exist. Reason: $d -$ orbital in $P -$ atom takes part in chemical bonding, this lacks in $N -$ atom.