220-- Regarding the following, how many statements are correct? $(\mathrm{H=1,\ C=12\ ;\ g.mol^{-1}})$
- 73.5\% of the molecular mass of paraxylene is contributed by carbon.
- The number of carbon atoms in a molecule of paraxylene equals the number of styrene molecules.
- Acetic acid can be obtained directly from a suitable reaction of ethane.
- Methanol can be obtained by reacting $\mathrm{H_2}$ gas with $\mathrm{CO}$ gas using a suitable catalyst and at a suitable temperature.
- The monomers forming a polymer with the structural formula [Figure: polymer structural formula showing repeating ester-linked units with carbonyl groups] are one difunctional alcohol and one difunctional acid.
(1) five (2) four (3) three (4) two
[Space for calculations]