JEE Main 2022 · 24 Jun · Shift 2 · Chemistry Q70

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ChemistrySingle correct+4 / -1Question 70 of 90

$\mathrm{PCl_5}$ is well known, but $\mathrm{NCl_5}$ is not. Because,

nitrogen is less reactive than phosphorous.

nitrogen doesn't have d-orbitals in its valence shell.

catenation tendency is weaker in nitrogen than phosphorous.

size of phosphorous is larger than nitrogen.

Answer and worked solution

Official answer: B

Expanding the octet. P (3rd period) has vacant 3d orbitals and can form five bonds. N (2nd period) has only 2s and 2p orbitals, so it cannot exceed four electron pairs; $\mathrm{NCl_5}$ does not exist.

(B)

Topics:Group 15 Hybridisation

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JEE Main 2022 · 24 Jun · Shift 2, Chemistry question 70