N_2 forms NCl_3, whereas P can form both PCl_3 and PCl_5. Why? [OJEE 2004]

JEE Main Chemistry question

forms , whereas can form both and . Why? [OJEE 2004]

(A) has low-lying orbitals which can be used for bonding, but does not have low-lying orbitalsCorrect
(B) atom is larger than in size
(C) is more reactive towards than
(D)None of the above

Answer: (A)

Solution

Phosphorus (period 3) has accessible, energetically reasonable orbitals that can participate in bonding, allowing it to expand its octet and form a 5-coordinate

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Question ID VK-145646