9. Nuclear reactor power stations use uranium as a fuel to produce energy. Steam is generated by the heat released during the ___ process. It is this steam that turns a
turbine to produce electric energy.
a. Fusion
b. Fission
c. Isotopic
d. Radiation

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.