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MCQ practice · SSC Chemistry Board questions · Chapter 11: Mineral Resources: Fossils

Rajshahi Board 2024

What is the range of carbon numbers in naphtha?

Think it through first, then pick an option.

  1. a 5-10
  2. b 7-14
  3. c 11-16
  4. d 17-20
Answer and explanation

Correct answer: b 7-14

The hydrocarbons in naphtha have 7 to 14 carbon atoms per molecule.

Why the other options are wrong

  • a 5-10: 5-10 is petrol's carbon number; naphtha has 7-14.
  • c 11-16: 11-16 is kerosene's carbon number; naphtha has 7-14.
  • d 17-20: 17-20 is diesel's carbon number; naphtha has 7-14.