JEE Main · 2022 · Shift-IeasyPB12-006

The most stable trihalide of nitrogen is.

p-Block Elements (Class 12) · Class 12 · JEE Main Previous Year Question

Question

The most stable trihalide of nitrogen is.

Options
  1. a

    NF3\mathrm{NF_3}

  2. b

    NCl3\mathrm{NCl_3}

  3. c

    NBr3\mathrm{NBr_3}

  4. d

    NI3\mathrm{NI_3}

Correct Answera

NF3\mathrm{NF_3}

Detailed Solution

Strategy: Compare the stability of nitrogen trihalides based on bond strength and thermodynamics.

Step 1: Stability Trends Among the trihalides of Nitrogen (\ceNX3)(\ce{NX3}), only \ceNF3\ce{NF3} is exothermic and stable. This is because both \ceN\ce{N} and \ceF\ce{F} are small, allowing for effective orbital overlap.

Step 2: Instability of Others The halides \ceNCl3,NBr3,\ce{NCl3, NBr3,} and \ceNI3\ce{NI3} are endothermic and highly explosive due to the large size difference between Nitrogen and the heavier halogens.

Answer: (Option) [a] \ceNF3\boxed{\text{Answer: (Option) [a] $\ce{NF3}$}}

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