Arrange the following fuels in decreasing order of the amount of carbon…
2020
Arrange the following fuels in decreasing order of the amount of carbon dioxide emitted per unit of energy output from their combustion:
(A) Natural gas
(B) Coal (lignite)
(C) Gasoline (without ethanol)
(D) Propane
Choose the correct answer from the options given below:
- A.
(A) > (B) > (D) > (C)
- B.
(B) > (A) > (C) > (D)
- C.
(B) > (C) > (D) > (A)
- D.
(D) > (B) > (C) > (A)
Show answer & explanation
Correct answer: C
CO2 emission per unit energy depends on carbon content and heating value. Lignite coal has the highest emission intensity. Gasoline is next, followed by propane. Natural gas, mainly methane, has the lowest CO2 emitted per unit of energy among these fuels. Therefore, the decreasing order is (B) > (C) > (D) > (A).