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JEE Main20236 Apr 2023Evening ShiftChemistryp Block Elements (Group 13 & 14)Actual

Structures of BeCl 2 in solid state, vapour phase and at very high temperature respectively are:

Options

  1. AMonomeric, Dimeric, Polymeric
  2. BDimeric, Polymeric, Monomeric
  3. CPolymeric, Monomeric, Dimeric
  4. DPolymeric, Dimeric, Monomeric

Correct answer

D. Polymeric, Dimeric, Monomeric

Step-by-step solution

BeCl 2 is dimeric in vapour phase. The coordination number of beryllium is 3. BeCl 2 is monomeric at high temperature. The coordination number of beryllium is 2. BeCl 2 is polymeric in solid state. The coordination number of beryllium is 4.

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