Imat 2017 question 48

Consider the following list of particles:

  1. molecules
  2. ions
  3. single atoms
    Which one of the following options correctly describes the particles that are present in an
    aqueous solution of sodium chloride?
    A. 1 and 2 only
    B. 1, 2 and 3
    C. 3 only
    D. 1 only
    E. 2 only

Hi, can someone please explain why the answer for this question is A? I don’t get why 1 is correct as I thought ionic compounds cannot be molecules. Also could you explain why 3 is wrong? Thank you

Sodium chloride will dissociate into sodium and chloride ions.
In the aqueous solution we also have water molecules.
We do not however have any free single atoms. So only 1 and 2 are correct thus A is the correct answer.
Hope it helps:)