Assertion : doesn't exist and converts into and spontaneously at room temperature but…

CHEMISTRY · Subjective · A Level · Chemistry · Periodicity and periodic trends · Periodicity and periodic trends

Problem

Assertion :

\text{PbI}_4

doesn't exist and converts into

\text{PbI}_2

and

\text{I}_2

spontaneously at room temperature but

\text{PbCl}_4

needs heating to convert into

\text{PbCl}_2

and

\text{Cl}_2

. Reason :

\text{Pb}^{2+}

is more stable than

\text{Pb}^{4+}

due to inert pair effect.