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(D) $I. Ca(OH)_2$ is used for white washing.$II. NaCl$ is used in the Solvay process for the preparation of washing soda $(Na_2CO_3)$:$2NH_3 + H_2O +

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$I-B, II-D, III-A, IV-C$

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(D) $I. Ca(OH)_2$ is used for white washing.$II. NaCl$ is used in the Solvay process for the preparation of washing soda $(Na_2CO_3)$:$2NH_3 + H_2O + CO_2 \longrightarrow (NH_4)_2CO_3$$(NH_4)_2CO_3 + H_2O + CO_2 \longrightarrow 2NH_4HCO_3$$NH_4HCO_3 + NaCl \longrightarrow NH_4Cl + NaHCO_{3(s)}$$2NaHCO_3 \xrightarrow{\Delta} Na_2CO_3 + CO_2 + H_2O$$III. CaSO_4 \cdot \frac{1}{2}H_2O$ (Plaster of Paris) is used for making casts of statues.$IV. CaCO_3$ is used as an antacid.

Column-$I$	Column-$II$
$I. Ca(OH)_2$	$A$. Casts of statues
$II. NaCl$	$B$. White wash
$III. CaSO_4 \cdot \frac{1}{2}H_2O$	$C$. Antacid
$IV. CaCO_3$	$D$. Washing soda preparation

Column-$I$	Column-$II$
$(i)$ Solvay process	$(p)$ $Na_2O$
$(ii)$ Evolve $CO_2$ on heating	$(q)$ $Na_2O_2$
$(iii)$ Aqueous solution is not neutral towards litmus	$(r)$ $NaHCO_3$
$(iv)$ Used as air purifier in submarine	$(s)$ $Na_2CO_3$

List-$I$ (Chemical)	List-$II$ (Use)
$A$. $KOH$	$I$. Coolant
$B$. $Na_{(l)}$	$II$. Antacid
$C$. $Li$	$III$. Electrochemical Cells
$D$. $Mg(OH)_2$	$IV$. Absorbent for $CO_2$

Match the following compounds (Column-$I$) with their uses (Column-$II$):

Column-$I$ Column-$II$

$I. Ca(OH)_2$ $A$. Casts of statues

$II. NaCl$ $B$. White wash

$III. CaSO_4 \cdot \frac{1}{2}H_2O$ $C$. Antacid

$IV. CaCO_3$ $D$. Washing soda preparation

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Provide the primary details of alkali and alkaline earth metals.

Match the following columns:

Column-$I$ Column-$II$

$(i)$ Solvay process $(p)$ $Na_2O$

$(ii)$ Evolve $CO_2$ on heating $(q)$ $Na_2O_2$

$(iii)$ Aqueous solution is not neutral towards litmus $(r)$ $NaHCO_3$

$(iv)$ Used as air purifier in submarine $(s)$ $Na_2CO_3$

Match the following:

List-$I$ (Chemical) List-$II$ (Use)

$A$. $KOH$ $I$. Coolant

$B$. $Na_{(l)}$ $II$. Antacid

$C$. $Li$ $III$. Electrochemical Cells

$D$. $Mg(OH)_2$ $IV$. Absorbent for $CO_2$

The correct answer is:

Which of the following is not true about potash alum?

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Match the following compounds (Column-$I$) with their uses (Column-$II$): Column-$I$ Column-$II$ $I. Ca(OH)_2$ $A$. Casts of statues $II. NaCl$ $B$. White wash $III. CaSO_4 \cdot \frac{1}{2}H_2O$ $C$. Antacid $IV. CaCO_3$ $D$. Washing soda preparation