www.McqFinder.in

Home
MCQ
Search
Free Apps
Important
Study Groups
Contact Us
Policy

Home
MCQ
Objective Questions
GS
GS Set-1
Chemistry
Physical Chemistry
118

Physical Chemistry MCQ with Answers

118) 15 gm of methyl alcohol is dissolved in 35 gm of water. What is the mass percentage of methyl alcohol in solution?

30%

50%

70%

75%

Answer is:

0.3

Explanation:

Mass percentage = (mass of methyl alcohol ⁄ mass of solution) x 100

Physical Chemistry MCQ with Answers

For more MCQ's Click Here

119) Osmotic pressure of a sugar solution at 24^oC is 2.5 atm. Determine the concentration of the solution in gm mol⁄L:

0.0821 mol⁄L

1.082 mol⁄L

0.1025 mol⁄L

0.0827 mol⁄L

Answer is:

0.1025 mol⁄L

Explanation:

C = π⁄ST

120) 20 gm of a substance was dissolved in 500 mL of water and the osmotic pressure of the solution was found to be 600 mm of Hg at 15^oC. Determine the molecular weight of the substance:

1120

1198

1200

None of these

Answer is:

1198

121) 0.15 gm of a substance, dissolved in 15 gm of solvent, was boiled at a temperature higher by 0.216^oC than that of the pure solvent. Calculate the molecular weight of the substance: (Molal elevation constant for the solvent = 2.16^oC)

216

100

178

None of these

Answer is:

100

Explanation:

m = (1000 x K_b x w) ⁄ (ΔT_b x W)

122) The concentration of pollutant in ppm, that has been measured at 450 mg per 150 kg of sample, is:

3 ppm

6 ppm

9 ppm

12 ppm

Answer is:

3 ppm

Physical Chemistry MCQ with Answers

For more MCQ's Click Here

118) 15 gm of methyl alcohol is dissolved in 35 gm of water. What is the mass percentage of methyl alcohol in solution?

0.3

Physical Chemistry MCQ with Answers

Related Physical Chemistry MCQ with Answers

119) Osmotic pressure of a sugar solution at 24oC is 2.5 atm. Determine the concentration of the solution in gm mol⁄L:

0.1025 mol⁄L

120) 20 gm of a substance was dissolved in 500 mL of water and the osmotic pressure of the solution was found to be 600 mm of Hg at 15oC. Determine the molecular weight of the substance:

1198

121) 0.15 gm of a substance, dissolved in 15 gm of solvent, was boiled at a temperature higher by 0.216oC than that of the pure solvent. Calculate the molecular weight of the substance: (Molal elevation constant for the solvent = 2.16oC)

100

122) The concentration of pollutant in ppm, that has been measured at 450 mg per 150 kg of sample, is:

3 ppm

Physical Chemistry MCQ with Answers

119) Osmotic pressure of a sugar solution at 24^oC is 2.5 atm. Determine the concentration of the solution in gm mol⁄L:

120) 20 gm of a substance was dissolved in 500 mL of water and the osmotic pressure of the solution was found to be 600 mm of Hg at 15^oC. Determine the molecular weight of the substance:

121) 0.15 gm of a substance, dissolved in 15 gm of solvent, was boiled at a temperature higher by 0.216^oC than that of the pure solvent. Calculate the molecular weight of the substance: (Molal elevation constant for the solvent = 2.16^oC)