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

Rajshahi Board 2022

Which statement is correct?

Think it through first, then pick an option.

  1. a C₂H₆ is more reactive than C₂H₄
  2. b CH₄ reacts with bases
  3. c ethanol is a hydrocarbon
  4. d polypropylene can be recycled
Answer and explanation

Correct answer: d polypropylene can be recycled

According to the book, plastics such as polypropylene can be collected and recycled for reuse.

Why the other options are wrong

  • a C₂H₆ is more reactive than C₂H₄: The reverse: with its weak second bond, C₂H₄ (an alkene) is more reactive than C₂H₆.
  • b CH₄ reacts with bases: Alkanes generally do not react with acids or bases; methane is quite inert.
  • c ethanol is a hydrocarbon: Ethanol contains oxygen, so it is not a hydrocarbon; it is an alcohol.