# Given below are two statements :

Question:

Given below are two statements :

Statement $\mathrm{I}:$ Both $\mathrm{CaCl}_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O}$ and $\mathrm{MgCl}_{2} \cdot 8 \mathrm{H}_{2} \mathrm{O}$

undergo dehydration on heating.

Statement II : $\mathrm{BeO}$ is amphoteric whereas the

oxides of other elements in the same group are acidic

In the light of the above statements, choose the correct answer from the options given below :

1.  Statement I is false but statement II is true

2. Both statement I and statement II are false

3.  Both statement I and statement II are true

4.  Statement I is true but statement II is false

Correct Option: , 2

Solution:

(a) $\mathrm{CaCl}_{2} .6 \mathrm{H}_{2} \mathrm{O} \stackrel{\Delta}{\longrightarrow} \underset{\text { (Anhydrous) }}{\mathrm{CaCl}_{2}}+6 \mathrm{H}_{2} \mathrm{O}$

(b) $\mathrm{MgCl}_{2} \cdot 8 \mathrm{H}_{2} \mathrm{O} \stackrel{\Delta}{\longrightarrow} \mathrm{MgO}+2 \mathrm{HCl}+6 \mathrm{H}_{2} \mathrm{O}$

The dehydration of hydrated chloride of calcium can be achieved. The corresponding hydrated chloride of magnesium on heating suffer hydrolysis.

(c) $\mathrm{BeO} \rightarrow$ Amphoteric

$\left.\begin{array}{l}\mathrm{MgO} \\ \mathrm{CaO} \\ \mathrm{SrO} \\ \mathrm{BaO}\end{array}\right] \Rightarrow$ All are basic oxide