Solutions
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Solutions
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25 Questions

1. Blood cells retain their normal shape in solution which are [1991]
2. A solution of acetone in ethanol [2006]
3. If 0.1 Msolution of glucose and 0.1 Msolution of urea are placed on two sides of the semipermeable membrane to equal heights - then it will be correct to say that [1992]
4. Which of the following aqueous solution has minimum freezing point? [1991]
5. Molarity of liquidHCl will be - if density of solution is 1.17 gm/c [2001]
6. How many grams of concentrated nitric acid solution should be used to prepare 250 mLof 2.0M HNO3? The concentrated acid is 70% HNO3 [2013]
7. 0.5 molal aqueous solution of aweak acid(HX) is 20% ionised. If Kf for water is 1.86 K kg mol-“ 1 - the lowering in freezing point of the solution is [2007]
8. The vapour pressure of two liquids -˜P-™ and -˜Q-™ are 80 and 60 torr - respectively. The total vapour pressure of solution obtained by mixing 3 mole of Pand 2 mole of Qwould be [2005]
9. The beans are cooked earlier in pressure cooker - because [2001]
10. A solution containing 10 g per dm3 of urea(molecular mass = 60 g mol-“1) is isotonic with a solution of anon-volatile solute. The molecular mass of this nonvolatile solute is [2006]
11. At 25°C - the highest osmotic pressure is exhibited by 0.1 Msolution of [1994]
12. All form ideal solution except [1988]
13. 1.00 g of a non-electrolyte solute (molar mass 250 g mol-“1) 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 [2006]
14. A 0.1 molal aqueous solution of a weak acid is 30% ionized. If Kf for water is 1.86°C/m - the freezing point of the solution will be [2011]
15. Which of the following colligative property can provide molar mass of proteins (or polymers or colloids) with greatest precision? [2000]
16. The vapour pressure at a given temperature of an ideal solution containing 0.2 mol of a nonvolatile soluteand 0.8 mol of solvent is 60 mm of Hg. The vapour pressure of the pure solvent at the same temperature is [1996]
17. The mole fraction of the solute in one molal aqueous solution is: [2005]
18. 25.3 g of sodium carbonate - Na2 CO3 is dissolved in enough water to make 250 mLof solution. If sodium carbonate dissociates completely - molar concentration of sodium ions - Na+and carbonate ions - CO32- are respectively(Molar mass of Na2CO3 = 106 g mol-“1) [2010]
19. The number of moles of oxygen in one litre of air containing 21% oxygen by volume - in standard conditions - is [1995]
20. During osmosis - flow of water through a semipermeable membrane is [2006]
21. Which one is a colligative property? [1992]
22. Vapour pressure of benzene at 30°C is 121.8 mm. When 15 g of anon volatile solute is dissolved in 250 g of benzene its vapour pressure decreased to 120.2 mm. The molecular weight of the solute (Mo. wt. of solvent = 78) [1995]
23. 200 mL of an aqueous solution of aprotein contains its 1.26 g. The osmotic pressure of this solution at 300 Kis found to be 2.57 × 10-“3 bar. The molar mass of protein will be (R= 0.083 Lbar mol-“1 K-“1) [2011]
24. The vapour pressure of a solvent decreased by 10mm of mercury when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent if the decrease in the vapour pressure is to be 20mm of mercury? [1998]
25. The van-™t Hoff factor i for a compound which undergoes dissociation in one solvent and association in other solvent is respectively: [2011]

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