JEE Main 2022 · 24 Jun · Shift 1 · Chemistry Q71

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ChemistrySingle correct+4 / -1Question 71 of 90

The most stable trihalide of nitrogen is :

\mathrm{NF_3}

\mathrm{NCl_3}

\mathrm{NBr_3}

\mathrm{NI_3}

Answer and worked solution

Official answer: A

Stability. Small F forms a strong N-F bond and the molecule has no steric strain. Going to Cl, Br and I the N-X bond weakens and the large halogens crowd the small N atom; $\mathrm{NI_3}$ is explosive.

$\mathrm{NF_3}$ is the most stable.

(A)

Topics:Group 15

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JEE Main 2022 · 24 Jun · Shift 1, Chemistry question 71