M K Verma Solutions for Chapter: s-Block Elements, Exercise 1: TOPICWISE QUESTIONS

$\mathrm{LiCl}>\mathrm{NaCl}$ holds for:

The hybridisation of fully hydrated $\mathrm{Be}$ is

Excess of $\mathrm{Li}$ and $\mathrm{Mg}$ are allowed to react separately with one mole of ${\mathrm{N}}_2$ gas to form $\mathrm{X}$ and $\mathrm{Y}$, respectively. The ratio of gaseous products obtained on complete hydrolysis of both compounds ($\mathrm{X}$ and $\mathrm{Y}$) is

The best route for the preparation of ${\mathrm{BeF}}_2$ is

One mole of a substance $\left(\mathrm{A}\right)$ on reacting with excess of water gives two moles of readily combustible gas and an alkaline solution. The alkaline solution obtained, gives white turbidity with ${\mathrm{SO}}_2$ gas. The substance $\left(\mathrm{A}\right)$ is

A compound $\mathrm{X}$ has the following characteristics:
$\mathrm{a}.$ It is used as a disinfectant.
$\mathrm{b}.$ It is used to prepare bleaching powder.
$\mathrm{c}.$ Its suspension in water is called milk of lime.

Then compound $\mathrm{X}$ is

$\mathrm{X}+\mathrm{C}+{\mathrm{Cl}}_2\underset{\mathrm{temperature}}{\overset{\mathrm{High}}{\to }}\mathrm{Y}+\mathrm{CO}$

$\mathrm{Y}+2{\mathrm{H}}_2\mathrm{O}\to \mathrm{Z}+2\mathrm{HCl}$

In the above reactions, compounds $\mathrm{X}$ and $\mathrm{Y}$ have a polymeric structure. Then the compounds $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ are, respectively:

On heating a mixture of one mole each ${\mathrm{Li}}_2{\mathrm{CO}}_3, {\mathrm{MgCO}}_3$ and ${\mathrm{Na}}_2{\mathrm{CO}}_3$, the volume of ${\mathrm{CO}}_2$ evolved under $\mathrm{STP}$ condition will be