P and Q are two liquid compounds whose $M_r$ values are similar. The molecules of P are held together by hydrogen bonds, whereas the molecules of Q are attracted to one another only by van der Waals’ forces. In what ways do the properties of P and Q differ?
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct