Which among the following are unsaturated hydrocarbons?
$(i) H_3C - CH_2 - CH_2 - CH_3$
$(ii) H_3C - C \equiv C - CH_3$
$(iii) H_3C - CH(CH_3) - CH_3$
$(iv) H_3C - C(CH_3) = CH_2$

What is the monomer unit of neoprene?

Which of the following functional groups is present in aldehyde compounds?

$A$ compound $C$ (molecular formula $C_2H_4O_2$) reacts with $Na$ metal to form a compound $R$ and evolves a gas which burns with a pop sound. Compound $C$ on treatment with an alcohol $A$ in the presence of an acid forms a sweet-smelling compound $S$ (molecular formula $C_3H_6O_2$). On addition of $NaOH$ to $C$,it also gives $R$ and water. $S$ on treatment with $NaOH$ solution gives back $R$ and $A$. Identify $C$,$R$,$A$,$S$ and write down the reactions involved.

How did ethanoic acid get its name as glacial acetic acid?

Which catalyst is used to increase the rate of the vulcanization process of rubber?