AP TET Paper 2 Math and Science Model Paper 2

Concept:Hydrocarbons are classified by the type of carbon-carbon bond present in their molecules.Explanation:$\mathrm{C}_{2}\mathrm{H}_{2}$ is acetylene and contains a triple bond between carbon atoms. It is an alkyne.$\mathrm{C}_{2}\mathrm{H}_{4}$ is ethylene and contains a double bond between carbon atoms. It is an alkene.$\mathrm{C}_{2}\mathrm{H}_{6}$ is ethane and contains only single bonds between carbon atoms. It is an alkane.Therefore, the correct order is alkyne, alkene, and alkane respectively.Answer:Option A: Alkyne, alkene, and alkane hydrocarbons, respectively.