Which of the following is a biodegradable synthetic polymer?

Which of the following does not belong to the same homologous series?

What are hydrocarbons? Give examples.

Write the chemical formula and draw the electron dot structure of carbon tetrachloride.

Write the names of the next homologues of $CH_{3}CH_{2}OH$ and $HCOOH$.

Why should we prefer vegetable oils over animal fats for cooking food? Give a balanced chemical equation for the reaction for hydrogenation of vegetable oils. Name the catalysts in this reaction.