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| Column-$I$ | Column-$II$ |
|---|---|
| $I$. $Na_2CO_3 \cdot 10H_2O$ | $A$. Portland cement ingredient |
| $II$. $Mg(HCO_3)_2$ | $B$. Castner-Kellner process |
| $III$. $NaOH$ | $C$. Solvay process |
| $IV$. $Ca_3Al_2O_6$ | $D$. Temporary hardness |
| List-$I$ | List-$II$ |
|---|---|
| $A$. Chlorophyll | $I$. $Na_2CO_3$ |
| $B$. Soda ash | $II$. $CaSO_4$ |
| $C$. Dentistry,Ornamental work | $III$. $Mg^{2+}$ |
| $D$. Used in white washing | $IV$. $Ca(OH)_2$ |
| 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 | $(s)$ $Na_2CO_3$ |
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