1 – Wrong. Covalent bonds in position 1 are between one liquid and the other liquid. However, in position 3, only one of the liquids is obtained so the same covalent bonds are not formed.
2 – Correct. In position 3, the particles are in liquid form but in position 2, particles are in gas form. Particles are closer in liquid form than gas form.
3 – Wrong. In position 1, heat is being supplied to the mixture. So it is an endothermic process. Also, breaking bonds requires energy so it must be an endothermic change.
Since only statement 2 is correct, C is the answer.