1.

Explain :BeCl2 is covalent while MgCl2 is ionic.

Answer»
  • Be2+ ion has very small ionic size and therefore, it has very high charge density.
  • Due to this, it has high tendency to distort the electron cloud around the negatively charged chloride ion (Cl-) which is larger in size.
  • This results in partial covalent character of the bond in BeCl2.
  • Mg2+ ion has very less tendency to distort the electron cloud of Cl- due to the bigger size of Mg2+ as compared to Be2+.

Hence,

BeCl2 is covalent while MgCl2 is ionic.


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