Question:
Which of the following is not to be considered as a primary fuel?
Which of the following is not to be considered as a primary fuel?
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Primary fuels occur naturally, while secondary fuels are produced by processing primary fuels.
Updated On: May 7, 2026
- Wood
- Petroleum
- Coke
- Coal
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The Correct Option is C
Solution and Explanation
Concept:
Primary fuels are obtained directly from nature. Secondary fuels are obtained by processing primary fuels.
Step 1: Wood is obtained directly from nature, so it is a primary fuel.
Step 2: Petroleum is obtained naturally from the earth, so it is a primary fuel.
Step 3: Coal is also obtained naturally, so it is a primary fuel.
Step 4: Coke is obtained by destructive distillation of coal.
So coke is not a primary fuel; it is a secondary fuel. Therefore, \[ \boxed{\text{Coke}} \]
Step 1: Wood is obtained directly from nature, so it is a primary fuel.
Step 2: Petroleum is obtained naturally from the earth, so it is a primary fuel.
Step 3: Coal is also obtained naturally, so it is a primary fuel.
Step 4: Coke is obtained by destructive distillation of coal.
So coke is not a primary fuel; it is a secondary fuel. Therefore, \[ \boxed{\text{Coke}} \]
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