A solution containing 10 g per dm3 of urea (molecular mass = 60 g mol-1) is isotonic with a 5% solution of a non-volatile solute. The molecular mass of this non-volatile solute is:

(1) 250 g mol-1               

(2) 300 g mol-1

(3) 350 g mol-1               

(4) 200 g mol-1

Subtopic:  Concentration Terms & Henry's Law |
 85%
From NCERT
NEET - 2006
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1.00 g of a non-electrolyte solute (molar mass 250g mol) was dissolved in 51.2 g of benzene. If the freezing point depression constant, Kf of benzene is 5.12 K kg mol-1, the freezing point of benzene will be lowered by:
1. 0.4 K
2. 0.3 K
3. 0.5 K
4. 0.2 K

Subtopic:  Depression of Freezing Point |
 88%
From NCERT
NEET - 2006
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Consider equimolal aqueous solutions of NaHSO4 and NaCl with ATb and Arb as their respective boiling point elevations. The value of limx0ΔTbΔTb' will be :

(1) 1

(2) 1.5

(3) 3.5

(4) 3

Subtopic:  Elevation of Boiling Point |
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15 g of methyl alcohol is dissolved in 35 g of water. The weight percentage of methyl alcohol in solution is

(1) 30%

(2) 50%

(3) 70%

(4) 75%

Subtopic:  Concentration Terms & Henry's Law |
 80%
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Sea water contains 5.8 × 10–3 g of dissolved oxygen per kilogram. The concentration of oxygen in parts per million is:

1. 5.8 ppm

2. 58.5 ppm

3. 0.58 ppm

4. 0.05 ppm

Subtopic:  Concentration Terms & Henry's Law |
 73%
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Amount of NaOH present in 200 ml of 0.5 N solution is 

(1) 40 g

(2) 4 g

(3) 0.4 g

(4) 4.4 g

Subtopic:  Concentration Terms & Henry's Law |
 83%
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50 ml of 10NH2SO4,25ml of 12 N HCl and 40 ml of 5NHNO3 were mixed together and the volume of the mixture was made 1000 ml by adding water. The normality of the resulting solution will be 

(1) 1 N

(2) 2 N

(3) 3 N

(4) 4 N

Subtopic:  Concentration Terms & Henry's Law |
 82%
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Equal volumes of 0.1MAgNO3 and 0.2 M NaCl are mixed. The concentration of NO3 ions in the mixture will be 

(1) 0.1 M

(2) 0.05 M

(3) 0.2 M

(4) 0.15 M

Subtopic:  Concentration Terms & Henry's Law |
 51%
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Amount of oxalic acid ((COOH)2.2H2O) in grams that is required to obtain 250 ml of a semi-molar solution is - 

1. 17.75 g 2. 17.00 g
3. 15.75 g 4. 15.00 g
Subtopic:  Concentration Terms & Henry's Law |
 72%
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Volume of 10 M HCl should be diluted with water to prepare 2.00 L of 5 M HCl is 

(1) 2 L

(2) 1.5 L

(3) 1.00 L

(4) 0.5 L

Subtopic:  Concentration Terms & Henry's Law |
 90%
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