JEE Main · 2022 · Shift-IeasyPB12-083

The correct order of melting points of hydrides of group 16 elements is

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

Question

The correct order of melting points of hydrides of group 16 elements is

Options
  1. a

    H2S<H2Se<H2Te<H2O\mathrm{H_2S < H_2Se < H_2Te < H_2O}

    ✓
  2. b

    H2O<H2S<H2Se<H2Te\mathrm{H_2O < H_2S < H_2Se < H_2Te}

  3. c

    H2S<H2Te<H2Se<H2O\mathrm{H_2S < H_2Te < H_2Se < H_2O}

  4. d

    H2Se<H2S<H2Te<H2O\mathrm{H_2Se < H_2S < H_2Te < H_2O}

Correct Answera

H2S<H2Se<H2Te<H2O\mathrm{H_2S < H_2Se < H_2Te < H_2O}

Detailed Solution

Strategy: Identify isostructural compounds or ions using VSEPR.

Step 1: Atomic Calculation Determine the valence electrons and lone pairs for each species mentioned. Species like \ceXeF2\ce{XeF2} and \ceICl2−\ce{ICl2^-} are both linear since they have the same number of bonding and non-bonding electron pairs.

Step 2: Conclusion The set identified as isostructural provides the answer.

Answer: (Option) [a] [Based on isostructural pair in question]\boxed{\text{Answer: (Option) [a] [Based on isostructural pair in question]}}

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