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Question

Which one of the following would be INCORRECT to use?

This question was previously asked in
RRB ALP 2018 CBT 2 Fitter Question Paper (21-Jan-2019) (Shift 3)
The correct answer is

An atom of a compound

  • An atom of a compound is the INCORRECT usage.
  • Since molecules are the building blocks of a compound, therefore the correct usage would be "A molecule of a compound".
  • A compound has molecules made of atoms of different elements.
  • Since an element is formed from atoms, "An atom of an element" is correct to use.
  • "A mole of an element" is the amount of the element that contains 6.022 × 10 23 atoms of which it is made up of.
  • "A mole of a compound" is the amount of the compound that contains 6.022 × 10 23  molecules of which it is made up of.
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