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