The freezing point of depression constant (Kf ) of benzene is 5.12 K kg mol-1. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is-
(rounded off upto two decimal places):
1. 0.80 K
2. 0.40 K
3. 0.60 K
4. 0.20 K

Subtopic:  Depression of Freezing Point |
 87%
From NCERT
NEET - 2020
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

For a solution, the plot of osmotic pressure (π) 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. 310oC

3. 37oC

4. 3100.082K

Subtopic:  Osmosis & Osmotic Pressure |
 58%
From NCERT
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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

Subtopic:  Van’t Hoff Factor |
 54%
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At 100°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%

Subtopic:  Van’t Hoff Factor |
 55%
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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

Subtopic:  Van’t Hoff Factor |
 63%
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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

Subtopic:  Introduction & Colligative properties |
 54%
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When a saturated solution of sodium chloride is heated, it 

(1) becomes remains saturated 

(2) becomes unsaturated

(3) becomes supersaturated 

(4) achieves equilibrium state 

Subtopic:  Introduction & Colligative properties |
 54%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

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

 

1.   

 

2.

3.

4.  

  

 

Subtopic:  Concentration Terms & Henry's Law |
 55%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

ln liquid CCl4 which of the following has maximum solubility?

(1) l2

(2) Br2

(3) NaCl

(4) Cl2

Subtopic:  Introduction & Colligative properties |
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NEET 2023 - Target Batch - Aryan Raj Singh
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Which of the following represents a metastable system?

1. an unsaturated solution 

2. a dilute solution

3. a saturated solution 

4. a supersaturated solution 

Subtopic:  Introduction & Colligative properties |
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NEET 2023 - Target Batch - Aryan Raj Singh
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