We have three aqueous solutions of NaCl labelled as ' A ', ' B ' and ' C ' with concentrations $0.1 \mathrm{M}, 0.01 \mathrm{M}$ and 0.001 M , respectively. The value of van't Hoff factor for these solutions will be in the order .......... .

On the basis of information given below mark the correct option. Information

(i) In bromoethane and chloroethane mixture intermolecular interactions of $\mathrm{A}-\mathrm{A}$ and $\mathrm{B}-\mathrm{B}$ type are nearly same as $\mathrm{A}-\mathrm{B}$ type interactions.

(ii) In ethanol and acetone mixture $\mathrm{A}-\mathrm{A}$ or $\mathrm{B}-\mathrm{B}$ type intermolecular interactions are stronger than $A-B$ type interactions.

(iii) In chloroform and acetone mixture $\mathrm{A}-\mathrm{A}$ or $\mathrm{B}-\mathrm{B}$ type intermolecular interactions are weaker than $A-B$ type interactions.

Two beakers of capacity 500 mL were taken. One of these beakers, labelled as " $A$ ", was filled with 400 mL water whereas the beaker labelled " $B^{\prime}$ was filled with 400 mL of 2 M solution of NaCl . At the same temperature both the beakers were placed in closed containers of same material and same capacity as shown in figure.

At a given temperature, which of the following statement is correct about the vapour pressure of pure water and that of NaCl solution?

If two liquids $A$ and $B$ form minimum boiling azeotrope at some specific composition then

4 L of 0.02 M aqueous solution of NaCl was diluted by adding 1 L of water. The molality of the resultant solution is ........... .