If the group $CH_3-CH(CH_3)-CH_2-CH(CH_3)-$ is present as a branch in a molecule,which of the following names is correct? $(i)$ $2, 4-$dimethylbutyl $(ii)$ $1, 3-$dimethylbutyl

Draw the structures of the following compounds:
$(a)$ $3, 4-$dimethylhexane
$(b)$ $4, 5-$diethyl$-5-$methylnonane
$(c)$ Methylcyclopentane
$(d)$ $1, 3, 5-$triethylcyclohexane
$(e)$ Buta$-1, 3-$diene
$(f)$ Buta$-1, 3-$diyne
$(g)$ Hexa$-1, 3-$diene$-5-$yne

Give the structural formula of the following:
$(i)$ Ethanoic acid $(ii)$ Ethanal $(iii)$ Ethanol $(iv)$ Ethene

What is the $IUPAC$ name of the compound $CH_3COCH(CH_3)_2$?

The $IUPAC$ name for the following compound is

Match the structures given in Column-$I$ with their $\text{IUPAC}$ names in Column-$II$.
| Column-$I$ (Structure) | Column-$II$ ($\text{IUPAC}$ Name) |
| :--- | :--- |
| $(A)$ Cyclohexanol | $(i)$ $2$-ethoxy-$1,1$-dimethylcyclohexane |
| $(B)$ $2$-methylcyclopentanol | (ii) $3$-methylphenol |
| $(C)$ $3$-methylphenol | (iii) Trihydroxybenzene |
| $(D)$ $1$-ethoxy-$2,2$-dimethylcyclohexane | (iv) $2$-methylcyclopentanol |
| $(E)$ Benzene-$1,2,4$-triol | $(v)$ Cyclohexanol |
| | (vi) Benzene-$1,2,4$-triol |