Question

Energy source which do not evolve CO${}_2$ is

• A. Oil
• B. Coke
• C. Nuclear energy
• D. Other organic substances

Answer 1

Answer: (C)

Oil is a mixture of molecules that mainly contain carbon and hydrogen. When it burns it also produces CO${}_2$, but 25% less than coal for the same amount of energy (because the combustion of hydrogen gives energy but generates only water).

Coke and other organic substances when used as source of energy, CO${}_2$ can be released.

Nuclear energy can not evolve CO${}_2$. Thus, the correct answer is option C.