The structures of beryllium chloride in the solid state and vapor phase, respectively. are 

  1. A

    Chain and dimeric 

  2. B

    Chain and chain

  3. C

    Dimeric and dimeric 

  4. D

    dimeric and chain 

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    Solution:

    BeCl2 is an electron-deficient compound and has two empty orbitals. In solid molecules, one BeCl2 forms two coordinate bonds with the other two Cl atoms with another BeCl2 to form (BeCl2)2. This implies that BeCl2 exists as a dimer in a gaseous state. In a solid state, this dimer formation of BeCl2 as Be2Cl4 continues and forms a chain like structure like (BeCl2)n.

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