Question

Common salt besides being used in the kitchen can also be used as the raw material for making:

(i) washing soda

(ii) bleaching powder

(iii) baking soda

(iv) slaked lime

• A. (i) and (ii)
• B. (i), (ii) and (iv)
• C. (i) and (iii)
• D. (i), (iii) and (iv)

Answer 1

The correct option is C

(i) and (iii)

Explanation of the correct answer:

(A) - (i) and (ii) and (C) -(i) and (iii)

• Sodium chloride is the chemical term for common salt and its chemical formula is$\mathrm{NaCl}$.
• Common salt is used as a raw material in the production of sodium hydroxide, washing soda, $\mathrm{HCl}$ (hydrochloric acid), baking soda, bleaching powder, chlorine, and other goods.

$$\begin{gathered} \mathrm{NaCl}\left(\mathrm{aq}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{CO}}_2\left(\mathrm{g}\right)+{\mathrm{NH}}_3\left(\mathrm{g}\right)\to {\mathrm{NaHCO}}_3\left(\mathrm{s}\right)+{\mathrm{NH}}_4\mathrm{Cl}\left(\mathrm{s}\right) \\ 2\mathrm{NaCl}\left(\mathrm{aq}\right)+{\mathrm{CaCO}}_3\left(\mathrm{s}\right)\to {\mathrm{Na}}_2{\mathrm{CO}}_3\left(\mathrm{s}\right)+{\mathrm{CaCl}}_2\left(\mathrm{s}\right) \end{gathered}$$

Explanation of the incorrect answers:

(B) - (i), (ii) and (iv)

D) - (i), (iii) and (iv)

The production of slaked lime does not include common salt as the raw material.

Hence options (A) and (C) are correct.