The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequence
As we learnt in
Oxidation state of carbon family -
Exhibits O.S. of +4L and +2 (ionic) Ge, Sn and Pb +2 o.s. is prominent due to inert pair effect
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Due to inert pair effect, the stability of +2 oxidization state increases down the group.
Option 1)
This option is incorrect.
Option 2)
This option is incorrect.
Option 3)
This option is incorrect.
Option 4)
This option is correct.
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