MCQ
Match column 1 with column II and mark the correct option from the given codes.
| Column I | Column II |
| (a) $Na _2 CO _3$ | (i) Used for disinfecting water. |
| (b) $Na _2 CO _3$ | (ii) Used for soda-acid fire extinguishers. |
| (c) $CaOCl _2$ | (iii) Used for removing permanent hardness of water. |
| (d) $CaSO _4 \cdot \frac{1}{2} H _2 O$ | (iv) Used for making toys, materials for decoration. |
- A(a) (ii), (b) - (iii), (c) - (i), (d) - (iv)
- B(a) (iii), (b) - (ii), (c) - (i), (d) - (iv)
- C(a) (i), (b) - (ii), (c) - (iv), (d) - (iii)
- D(a) (iii), (b) - (i), (c) - (iv), (d) - (ii)
