Consider the following statements in the light of octane number and cetane number of fuels : 1. Cetane number is used for gasoline and octane number is used for diesel. 2. Octane number of n-hexadecane is 100 and cetane number of isooctane is 100. Which of the statements g… | UPSC CAPF 2026 Q No 107

Accepted Answer: (D) Neither 1 nor 2 [PPOs

Topic Covered: Chemistry and Energy

Key Concept: Chemical properties, fuels, petroleum and oxidation states

The correct choice follows from the standard scientific definition or process involved. “Neither 1 nor 2 [PPOs” matches the relevant biological, ecological, chemical or energy concept, while the alternatives conflict with the core principle.

The key is to apply the central fact, formula, definition or relationship tested in the question and then eliminate alternatives that do not satisfy it.