Colligative properties are observed when:
| (a) | A non-volatile solid is dissolved in a volatile liquid |
| (b) | A non-volatile liquid is dissolved in another volatile liquid |
| (c) | A gas is dissolved in a non-volatile liquid |
| (d) | A volatile liquid is dissolved in another volatile liquid |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
