For a solution, the plot of osmotic pressure ($\mathrm{\pi }$) versus the concentration (c in mol L^-1) gives a straight line with slope 310R where 'R' is the gas constant. The temperature at which osmotic pressure measured is -

1. 310 × 0.082 K

2. 310${}^{\mathrm{o}}$C

3. 37${}^{\mathrm{o}}$C

4. $\frac{310}{0.082}K$

For the dissociation of PCl₅ into PCl₃ and Cl₂ in gaseous phase reaction, if d is the observed vapour density and D the theoretical vapour density with 'a' as degree of dissociation. Variation of D/d with 'a' is given by which graph

1. 

2. 

3. 

4. Any of these

At $100°\mathrm{C}$ the vapour density of nitrogen peroxide (N₂O₄) is 26.8. The percentage dissociation into NO₂ molecules is

1. 71.64%

2. 61.57%

3. 83.56%

4. 67.39%

The vapour density of N₂O₄ at a certain temperature is 30. What is the percentage dissociation of N₂O₄ at this temperature?

1. 53.3

2. 106.6

3. 26.7

4. none of these

What is the correct sequence of active masses in increasing order in gaseous mixture, containing one gram per litre of each of the following?

I. NH₃

II. N₂

III. H₂

IV. O₂

Select the correct answer using the codes given below:

1. III, I, IV, II

2. III, IV, II, I

3. II, I, IV, III

4. IV, II, I, III

When a saturated solution of sodium chloride is heated, it 

(1) becomes remains saturated 

(2) becomes unsaturated

(3) becomes supersaturated 

(4) achieves equilibrium state 

The graph among the following that represents Henry's Law is -

1.   

2.

3.

4.  

ln liquid ${\mathrm{CCl}}_4$ which of the following has maximum solubility?

(1) l₂

(2) Br₂

(3) NaCl

(4) Cl₂

Which of the following represents a metastable system?

1. an unsaturated solution 

2. a dilute solution

3. a saturated solution 

4. a supersaturated solution 

When a non-volatile solute is dissolved in a solvent. The relative lowering of vapor pressure is equal to 

(1) Molar fraction of solute 

(2) Molar fraction of solvent 

(3) Concentration of the solute in grams per liter 

(4) Concentration of the solute in gram per 100 mL.