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NEET levelSingle correct optionDifficulty 1 of 3pt198

Which one of the following lead compounds is the more stable?

A $PbCl X_{4}$
B $PbCl X_{2}$
C $PbI X_{4}$
D $PbBr X_{4}$

Answer: B

Because of the inert pair effect,

+ 2

is the stable oxidation state of lead.

PbCl X_{4}

is an unstable liquid that loses

Cl X_{2}

easily, and

PbBr X_{4}

and

PbI X_{4}

are even less stable, so

PbCl X_{2}

is the most stable.

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