Write structures for each of the following compounds. Why are the given names incorrect? Write correct $IUPAC$ names.
$(i)$ $2-Ethylpentane$
$(ii)$ $5-Ethyl-3-methylheptane$

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 |

Write the $IUPAC$ names of the following compounds:
$(1)$ $CH_3(CH_2)_4-CH(CH_2CH(CH_3)_2)-(CH_2)_3CH_3$
$(2)$ $CH_3-CH=CH-CH_2-CH=CH-CH(C_2H_5)-CH_2-CH=CH_2$

What is the $IUPAC$ name of the given compound?

Which of the following molecules does not contain a chiral carbon?

The correct $IUPAC$ name of the following compound is:
$CH_3-CH_2-CH(CH_2-CH_3)-CH_2-CH(CH_3)-CH_2-CH_3$