Question

Consider the following statements.
$S_1$ : The percentage of s-character in the orbital forming $S-S$ bonds and $P-P$ bonds in $S_8$ and $P_4$ molecules respectively are same.
$S_2$ : In $S{F}_4$ the bond angles, instead of being ${90}^{\circ }$ and ${180}^{\circ }$ are ${89}^{\circ }and{177}^{\circ }$ respectively due to the repulsions between lone pair and bond pairs of electrons.
$S_3$ : Aqueous $H_{3}P{O}_4$ is syrup (i.e more viscous than water).
$S_4$ : $Si{O}_2$ crystal maybe considered as giant molecule in which eight-membered rings are formed with alternate silicon and oxygen atoms.

Select the correct option.

• A. $S_1\&S_4$ are correct only
• B. $S_2,S_3\&S_4$ are correct only.
• C. $S_1,S_2,S_3\&S_4$ are correct.
• D. $S_1,S_2\&S_3$ are correct only.

Answer 1

The correct option is B $S_2,S_3\&S_4$ are correct only.

$S_8\left(s{p}^3{d}^2\right)$ has 16.67 % s-character and $P_4\left(s{p}^3\right)$ has $25$% S- character. S1 is incorrect.

$S{F}_4$ has one lone pair of electrons on central $S$ atom that cause lone pair-bond pair repulsion.

$H_{3}P{O}_4$ is a thick syrup.

$Si{O}_2$ is the empirical formula, not the molecular formula of this substance. It is a network structure. Each silicon is connected to $4$ oxygens, yes, but then these oxygens are attached to more silicon atoms in a network.

$S_2,S_3,S_4$ are correct.
Option B is correct.