In a dilute solution, any colligative property depends on 

1. The total number of neutral species in the solution

2. The total number of ionic species in the solution

3. The total number of species irrespective of whether they are ionic or non-ionic.

4. The types of forces operating between the non-ionic species, ionic species and the solvent molecules

An aqueous solution of hydrochloric acid -

1. Obeys Raoult's law

2. Shows negative deviations from Raoult's law

3. Shows positive deviations from Raoult's law

4. Obeys Henry's law at all compositions

1. There is a positive deviation from Raoult's law
2. There is a negative deviation from Raoult's law
3. There is no deviation from Raoult's law
4. None of the above.

Which one of the following is incorrect for ideal solution ?

(1) $∆{\mathrm{H}}_{\mathrm{mix}}=0$

(2) $∆{\mathrm{U}}_{\mathrm{mix}}=0$

(3) $∆\mathrm{P}={\mathrm{P}}_{\mathrm{obs}}-{\mathrm{P}}_{\mathrm{calculated}<mspace\; width="1em"></mspace>\mathrm{by}<mspace\; width="1em"></mspace>\mathrm{Raoul}\text{'}\mathrm{s}<mspace\; width="1em"></mspace>\mathrm{law}}<mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>0$

(4) $∆{\mathrm{G}}_{\mathrm{mix}}=0$