A disclaimer: This problem does not assume any knowledge of chemistry:
The formulae for chemical molecules and their names are given below in mixed order:
C3H8, C4H6, C3H4, C4H8, C7H14, C2H2;
Heptene, Butyne, Propane, Butene, Ethyne, Propyne.
1.Match the formulae with the names.
Explain your solution.
2.Write the names corresponding to the following formulae: C2H4, C2H6, C7H12.
3.Write the formulae for the following molecules: Propene, Butane.
Source: Russian contest