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The structures of beryllium chloride in solid state and vapour phase, are:
(1) Chain and dimer, respectively
(2) Linear in both
(3) Dimer and Linear, respectively
(4) Chain in both

Beryllium chloride has a chain structure in the solid state and it is shown in the figure,

In vapour phase Beryllium chloride tends to form a chloro-bridged dimer.