- 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