www.ThinkITI.com

Home
MCQ
Search
Free Apps
Important
Study Groups
Contact Us
Policy

Home
MCQ
Objective Questions
GS
GS Set-1
Chemistry
Physical Chemistry
130

Physical Chemistry MCQ with Answers

130) Van′t Hoff factor for a dilute solution of sodium argento cyanide is:

0.25

0.5

Answer is:

2

Physical Chemistry MCQ with Answers

For more MCQ's Click Here

131) A solution obtained by dissolving 0.2 gm of solute in 100 cc of solution in benzene at 21^oC develops at a rise of 2 mm of Hg osmotic equilibrium. Find molarity of the solution: (Density of solution = 0.88 gm⁄cc)

8.3 x 10⁻³ mol⁄L

4.15 x 10⁻⁶ mol⁄L

8.3 x 10⁻⁴ mol⁄L

None of these

Answer is:

8.3 x 10⁻³ mol⁄L

132) When mercuric iodide is added to the aqueous solution of potassium iodide, the:

Freezing point is raised

Freezing point does not change

Freezing point is lowered

Boiling point does not change

Answer is:

Freezing point is raised

Explanation:

There is a decrease in number of ions present in the solution, so ΔT_f decreases.

133) The osmotic pressure of urea solution is 500 mm of Hg at 10^oC. If the solution is diluted and temperature is raised to 25^oC, the osmotic pressure decreases to 105.3 mm of Hg. What is the extent of dilution?

10 times

2.5 times

5 times

7.5 times

Answer is:

5 times

134) Benzene and toluene form nearly ideal solutions. At 20^oC, the vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The partial vapour pressure of benzene at 20^oC for a solution containing 78 gm of benzene and 46 gm of toluene in torr is:

37.5

53.5

Answer is:

50

Explanation:

P_B = P_B^o x χ_B

Physical Chemistry MCQ with Answers

For more MCQ's Click Here

130) Van′t Hoff factor for a dilute solution of sodium argento cyanide is:

2

Physical Chemistry MCQ with Answers

Related Physical Chemistry MCQ with Answers

131) A solution obtained by dissolving 0.2 gm of solute in 100 cc of solution in benzene at 21oC develops at a rise of 2 mm of Hg osmotic equilibrium. Find molarity of the solution: (Density of solution = 0.88 gm⁄cc)

8.3 x 10−3 mol⁄L

132) When mercuric iodide is added to the aqueous solution of potassium iodide, the:

Freezing point is raised

133) The osmotic pressure of urea solution is 500 mm of Hg at 10oC. If the solution is diluted and temperature is raised to 25oC, the osmotic pressure decreases to 105.3 mm of Hg. What is the extent of dilution?

5 times

134) Benzene and toluene form nearly ideal solutions. At 20oC, the vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The partial vapour pressure of benzene at 20oC for a solution containing 78 gm of benzene and 46 gm of toluene in torr is:

50

Physical Chemistry MCQ with Answers

131) A solution obtained by dissolving 0.2 gm of solute in 100 cc of solution in benzene at 21^oC develops at a rise of 2 mm of Hg osmotic equilibrium. Find molarity of the solution: (Density of solution = 0.88 gm⁄cc)

8.3 x 10⁻³ mol⁄L

133) The osmotic pressure of urea solution is 500 mm of Hg at 10^oC. If the solution is diluted and temperature is raised to 25^oC, the osmotic pressure decreases to 105.3 mm of Hg. What is the extent of dilution?

134) Benzene and toluene form nearly ideal solutions. At 20^oC, the vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The partial vapour pressure of benzene at 20^oC for a solution containing 78 gm of benzene and 46 gm of toluene in torr is: