What is the difference in terms of molar masses of the second and fourth members of a homologous series?

Classify hydrocarbon compounds and provide examples.

What is the product $(Q)$ of the following reaction?

Given below are two statements for the following reaction sequence.
Statement $I$: Compound $'Z'$ will give yellow precipitate with $NaOI$.
Statement $II$: Compound $'Q'$ has two different types of $'H'$ atoms (aromatic : aliphatic) in the ratio $1 : 3$.
In the light of the above statements, choose the correct answer from the option given below:

Name the distinguishing reaction of an alkane from an alkene.

An organic compound $C_4H_6$ on ozonolysis gives $HCHO$,$CO_2$,and $CH_3CHO$. The compound will be: