Question

Which of the following exists as a
dimer?
Aluminium chloride
b) Sodium bromide
c) Methyl iodide
d) Magnesium chloride​

Answer 1

hey

aluminum chloride Alcl3 is a electron deficient species. In order to complete the octet of Aluminum, the molecule dimerize to form Al2Cl6 in which electron are added to aluminum octet by coordinate bond by Chlorine atom

Answer 2

$\large \bf{Aluminium \: chloride}$