Embibe Experts Solutions for Chapter: The p-block Elements, Exercise 2: Level 2

Chlorine gas is produced from $\mathrm{HCl}$ by the addition of-

The Lewis acid strength of ${\mathrm{BF}}_3, {\mathrm{BCl}}_3$ and ${\mathrm{BBr}}_3$ follows the order:

A metal $\left(\mathrm{X}\right)$ dissolves both in dilute $\mathrm{HCl}$ and dilute $\mathrm{NaOH}$ to liberate ${\mathrm{H}}_2$. Addition of ${\mathrm{NH}}_4\mathrm{Cl}$ and excess ${\mathrm{NH}}_4\mathrm{OH}$ to an $\mathrm{HCl}$ solution of $\mathrm{X}$ produces $\mathrm{Y}$ as a precipitate. $\mathrm{Y}$ is also produced by adding ${\mathrm{NH}}_4\mathrm{Cl}$ to the $\mathrm{NaOH}$ solution of $\mathrm{X}$. The species $\mathrm{X}$ and $\mathrm{Y}$, respectively, are:

Amongst ${\mathrm{NH}}_3, {\mathrm{PH}}_3, {\mathrm{AsH}}_3$ and ${\mathrm{SbH}}_3$, the one with the highest boiling point is:

Select the incorrect statement.

Consider the following statements.

${\mathrm{S}}_1$: The percentage of $\mathrm{s}-$character in the orbital forming $\mathrm{S}-\mathrm{S}$ bonds and $\mathrm{P}-\mathrm{P}$ bonds in ${\mathrm{S}}_8$ and ${\mathrm{P}}_4$ molecules, respectively, are the same.

${\mathrm{S}}_2$: In ${\mathrm{SF}}_4$, the bond angles, instead of being $90°$ and $180°$ are $89°$ and $177°$, respectively, due to the repulsions between lone pair and bond pairs of electrons.

${\mathrm{S}}_3$: Aqueous ${\mathrm{H}}_3{\mathrm{PO}}_4$ is syrupy (i.e., more viscous than water).

${\mathrm{S}}_4$: ${\mathrm{SiO}}_2$ crystal may be considered as a giant molecule in which, eight-membered rings are formed with alternate silicon and oxygen atoms.

Of these:

Methyl chloride reacts with $\mathrm{X}$ at high temperature in the presence of a catalyst $\mathrm{Y}$ to give ${\mathrm{Me}}_2{\mathrm{SiCl}}_2$ as one of the products. The compound can also be formed by reaction of silicon tetrachloride with an organometallic reagent, $\mathrm{Z}$. $\mathrm{X}, \mathrm{Y}$, and $\mathrm{Z}$ respectively, are

The numbers of lone pair(s) on $\mathrm{Xe}$ in ${\mathrm{XeF}}_2$ and ${\mathrm{XeF}}_4$ are, respectively: