Recall that the value of K is small for reactions that form very little product. Reactions that for very little product are said to have an equilibrium that lies far to the left
have K values in excess of 1000
have an equilibrium that lies far to the right
result in very little leftover reactants at equilibrium

icc, international association for cereal chemistry

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.