The line-angle formula shows a seven-membered chain consisting of a line terminus, a segment of five vertices, and a line terminus. There is a triple bond between the leftmost line terminus and the first (from left to right) vertex and a double bond between the third and the fourth vertices. The second and the fifth chain vertices are on opposite sides of the double bond. Spell out the full name of the compound.

IUPAC name is: 4-methyl-cyclohexanol

Explanation:

IUPAC name is: 4-methyl-cyclohexanol

The hydroxyl group takes precedence over alkyl groups and halogen substituents, as well as double bonds, in the numbering of the parent chain. So in the parent chain i.e. cyclohexane the primary carbon will be the one connected to -OH group. Hence the carbon attatched to methyl group is 4. So the nomenclature is 4-methyl-cyclohexan-1-ol (or) wriiten as 4-methyl-cyclohexanol

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.