First slide

Atomic and physical properties

Question

Improper match among the following is

Moderate

A

$B > Tl > In > Ga > Al . . . Electronegativity$
B

${BCl}_{3} > {AlCl}_{3} > {GaCl}_{3} > {InCl}_{3} . .. Lewis acid strength$
C

${PbO}_{2} > {SnO}_{2} > {GeO}_{2} > {CO}_{2} . ... Oxidizing Power$
D

${PbO}_{2} > {SnO}_{2} > {SiO}_{2} > {CO}_{2} . ... A cidic strength$

Solution

${PbO}_{2} & {SnO}_{2} . .. amphoteric$
${SiO}_{2} & {CO}_{2} . .. acidic$
Down the group acidic oxide character decreases

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