- This Mock test contains 20 MCQ questions.
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- Question 1 of 20
1. Question1 point(s)
Sugar dissolved in water is a ____ type of solution.CorrectIncorrect
- Question 2 of 20
2. Question1 point(s)
The solubility of a gas in water increases with _______CorrectIncorrect
- Question 3 of 20
3. Question1 point(s)
At 300k , when a solute is added to a solvent its vapour pressure over mercury reduces from 50mm to 45mm . The value of mole fraction solute will be______CorrectIncorrect
- Question 4 of 20
4. Question1 point(s)
The boiling point of 0.15 molal aqueous solution of an unknown solute is 373.23 k at 1 atm. The molal elevation constant of water is ________ K kg/mol.CorrectIncorrect
- Question 5 of 20
5. Question1 point(s)
At 100ºC the vapour pressure of a solution of 6.5 g of a solute in 100 g water is 732 mm. If Kb = 0.52, the boiling point of this solution will be:CorrectIncorrect
- Question 6 of 20
6. Question1 point(s)
What is the molality of a solution containing 200 mg of urea (molar mass 60 g mol–1) dissolved in 40 g of water ?CorrectIncorrect
- Question 7 of 20
7. Question1 point(s)
Solubility of which among the following substances in water increases slightly with rise in temperature?CorrectIncorrect
- Question 8 of 20
8. Question1 point(s)
pA and pB are the vapour pressure of pure liquid components, A and B, respectively of an ideal binary solution. If xA represents the mole fraction of component A, the total pressure of the solution will beCorrectIncorrect
- Question 9 of 20
9. Question1 point(s)
Dissolving 120 g of urea (mol. wt. 60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution isCorrectIncorrect
- Question 10 of 20
10. Question1 point(s)
A solution of two liquids boils at a temperature more than the boiling point of either of them. Hence, the binary solution shows ______.CorrectIncorrect
- Question 11 of 20
11. Question1 point(s)
A 5.2 molal aqueous solution of methyl alcohol, CH3OH is supplied. What is the mole fraction of methyl alcohol in the solution?CorrectIncorrect
- Question 12 of 20
12. Question1 point(s)
18 g of glucose (C6H12O6) is added to 178.2 g of water. The vapour pressure of water for this aqueous solution at 100°C isCorrectIncorrect
- Question 13 of 20
13. Question1 point(s)
The vapour pressure of acetone at 20ºC is 180 torr . When 1.2 g of an non-volatile substance was dissolved in 100g of acetone at 20ºC, ist vapor pressure was 184 torr . The molar mass (g/mol) of the substance is ______CorrectIncorrect
- Question 14 of 20
14. Question1 point(s)
A 5% solution of cane sugar (molar mass 342 is isotonic with 1% of a solution of an unknown solute. The molar mass of unknown solute in g/mol isCorrectIncorrect
- Question 15 of 20
15. Question1 point(s)
An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase?CorrectIncorrect
- Question 16 of 20
16. Question1 point(s)
What is the osmotic pressure of a 0.0020 mol dm–3 sucrose (C12H22O11) solution at 20°C?
(Molar gas constant, R = 8.314 JK–1 mol–1, 1 dm3 = 0.001 m3?CorrectIncorrect
- Question 17 of 20
17. Question1 point(s)
6.02 × 1020 molecules of urea are present in 100 mL of its solution. The concentration of solution isCorrectIncorrect
- Question 18 of 20
18. Question1 point(s)
10 litre solution of urea contains 240 g urea. The active mass of urea will beCorrectIncorrect
- Question 19 of 20
19. Question1 point(s)
The number of moles of a solute in its solution is 20 and total number of moles are 80. The mole fraction of solute isCorrectIncorrect
- Question 20 of 20
20. Question1 point(s)
5.0 g of sodium hydroxide (molar mass 40 g m ) is dissolved in little quantity of water and the solution is diluted upto 100 mL. What is the molarity of the resulting solution?CorrectIncorrect