MCQ
Identify the product which represents the solid state in the above reaction.


- ABarium chloride
- ✓Barium sulphate
- CSodium chloride
- DSodium sulphate

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| Dominant trait | Recessive trait | No. of $F_2$ offspring |
| Round seeds | Wrinkled seeds | $7524$ |
| 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. |