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1. Which of the following is expected to be the most soluble in hexane, \(\text{C}_6\text{H}_{14}?\)
1. \(\text{KCl}\)
2. \(\text{C}_2\text{H}_5\text{OH}\)
3. \(\text{C}_6\text{H}_6\)
4. \(\text{H}_2\text{O}\)

2. Determine the vapor pressure (in torr) of a MgCl₂ solution, given the following data:
a) molality: 1 m
b) vapor pressure of pure solvent: 100 torr 
 c) \(\alpha \) (degree of dissociation)  = 80 % 

1.	95.53	2.	78.23
3.	68.12	4.	58.26

3. The density of a 3 M NaCl solution is 1 g/mL. The molality of the solution is ‘x’. The value of 2x is:
(Round off to the nearest integer.)
1. 7 
2. 10
3. 13
4. 5 

4. What is the partial pressure of helium when 8.0 grams of helium and 16 grams of oxygen are in a container with a total pressure of 5.00 atm? 
1. 0.25 atm 
2. 1.00 atm 
3. 1.50 atm 
4. 4.00 atm 

5.

Points A and B in the below-mentioned graph represent, respectively:

1.	Partial pressures of first and second components
2.	Vapour pressures of the pure second and first components
3.	Partial pressures of second and first components
4.	Vapour pressures of the pure first and second components

6. The vapour pressure of an aqueous solution obtained after mixing 900 g H₂O with 120 g urea at 373.15 K will be:
1. 650 mm Hg
2. 760 mm Hg
3. 730.77 mm Hg
4. 855 mm Hg 

7. Consider the two statements:

Statement I:	The value of Kf can be calculated by using \( K_{f} \ = \ \frac{R\times M_{1}\times T_{f}^{2}}{1000\times \Delta _{fus}H}\)
Statement II:	Unit of Ebullioscopic constant (Kb) is K kg L-1.

 

1.	Statement I is True, Statement II is False.
2.	Statement I is False, Statement II is True.
3.	Both Statement I and Statement II are True.
4.	Both Statement I and Statement II are False.

8.

Two containers are taken, each holding a different non-volatile solute, X and Y, as depicted.

The molar mass of \(X\) is \(60\%\) of that of \(Y\) and van't Hoff factor for \(X\) is \(1.2\) times of \(Y.\) The ratio of depression in freezing point of \(X\) and \(Y\) is:

1.	\( \dfrac {1} {2}\)	2.	\(2\)
3.	\(1.5\)	4.	\(\dfrac {2} {3}\)

9. Which of the following pair of aqueous solutions will have the same value of osmotic pressure?
(Assume complete dissociation in aqueous solution)
1. \(0.1~ \mathrm{{M}~ {BaCl}_2} \text { and } 0.2 ~\mathrm{{M} ~{K}_2 {SO}_4}\)
2. \(0.1~ \mathrm{{M}~ {Na}_3 {PO}_4} \text { and } 0.1 ~\mathrm{{M}~ {K}_2 {SO}_4}\)
3. \(0.2~ \mathrm{{M}~ {NaCl}} \text { and } 0.1 ~\mathrm{{M} ~{K}_2 {SO}_4}\)
4. \(0.2 ~\mathrm{{M} ~{NaCl}} \text { and } 0.1~ \mathrm{{M} ~{K}_3\left[{Fe}({CN})_6\right]}\)

10. Consider the following statements:

(A)	Components of an azeotropic binary mixture cannot be separated by fractional distillation.
(B)	Ethanol-water azeotropic mixture contains approximately 95% by volume of ethanol.
(C)	A solution containing components A and B follows Raoult's law if A-B attraction force remains the same as A-A and B-B attraction forces.

The correct statements are:
1. A and B only. 
2. B and C only. 
3. A, B, and C.
4. A and C only.