JEE Advanced levelOne or more correct optionsDifficulty 3 of 3pb049
Select the correct statement(s) about group 14 compounds.
APbClX4 is more stable than PbClX2.
B[SiFX6]X2− is known but [SiClX6]X2− is not.
CSnClX2 reduces HgClX2 to HgX2ClX2.
DSiClX4 is hydrolysed by water but CClX4 is not.
Answer: B, C, D
Si can expand its coordination (and has accessible 3d orbitals) so water attacks SiClX4, while C cannot, so A is true. Six large Cl atoms cannot fit around small Si, whereas six F atoms can, so B is true. Because of the inert pair effect Pb(II) is more stable than Pb(IV), so C is false. 2HgClX2+SnClX2HgX2ClX2+SnClX4 (Sn(II) is a reductant), so D is true.