Question:
Match the following compounds (Column-I) with their uses (Column-II) :
Correct Option: , 2
Solution:
(I) $\mathrm{Ca}(\mathrm{OH})_{2}$ is used in white wash.
(II) $\mathrm{NaCl}$ is used in preparation of washing soda $\left(\mathrm{Na}_{2} \mathrm{CO}_{3}\right)$.
(III) $\mathrm{CaSO}_{4} \cdot \frac{1}{2} \mathrm{H}_{2} \mathrm{O}$ is used for making casts of statues.
(IV) $\mathrm{CaCO}_{3}$ is used as an antacid.
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