JEE Main · 2019 · Shift-ImediumPB12-108

The chloride that CANNOT get hydrolysed is:

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

Question

The chloride that CANNOT get hydrolysed is:

Options
  1. a

    PbCl4\mathrm{PbCl_4}

  2. b

    CCl4\mathrm{CCl_4}

  3. c

    SnCl4\mathrm{SnCl_4}

  4. d

    SiCl2\mathrm{SiCl_2}

Correct Answerb

CCl4\mathrm{CCl_4}

Detailed Solution

Hydrolysis of chlorides:

  • PbCl4\mathrm{PbCl_4}: Pb has d-orbitals → can be hydrolysed ✗
  • CCl4\mathrm{CCl_4}: C has no d-orbitals and is completely surrounded by 4 Cl atoms (steric protection). Water cannot attack the carbon centre → cannot be hydrolysed
  • SnCl4\mathrm{SnCl_4}: Sn has d-orbitals → easily hydrolysed ✗
  • SiCl2\mathrm{SiCl_2}: Si has d-orbitals → can be hydrolysed ✗

CCl4\mathrm{CCl_4} is kinetically inert to hydrolysis despite being thermodynamically unstable.

Answer: Option (2) — CCl4\mathrm{CCl_4}

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