Chapter Exam

Unit 5: Solutions — Online MCQ Test

Q: The mixture which shows positive deviation from Raoult’s law is:

Answer: D. Ethanol + Acetone — Ethanol + Acetone shows positive deviation because the interaction between the components is weaker than the pure component interactions, leading to increased vapor pressure.

Q: The mixture which shows positive deviation from Raoult’s law is:

Answer: D. Ethanol + Acetone — Ethanol + Acetone is an example of a solution showing positive deviation from Raoult's law as the hydrogen bonds between ethanol molecules are weakened by the addition of acetone.

Q: Match the List-I (Example) with List-II (Type of Solution). List-I: (A) Humidity, (B) Alloys, (C) Amalgams, (D) Smoke. List-II: (I) Solid in solid, (II) Liquid in gas, (III) Solid in gas, (IV) Liquid in solid.

Answer: B. A-II, B-I, C-IV, D-III — Humidity is liquid in gas (A-II). Alloys are solid in solid (B-I). Amalgams are liquid in solid (C-IV). Smoke is solid in gas (D-III).

Q: Which of the following aqueous solution will exhibit highest boiling point?

Answer: C. 0.01 M Na2SO4 — Boiling point elevation depends on the Van't Hoff factor (i) and concentration. i*c: (1*0.01)=0.01, (2*0.01)=0.02, (3*0.01)=0.03, (1*0.015)=0.015. 0.01M Na2SO4 gives the highest value.

Q: Fog is a colloidal solution of:

Answer: D. Liquid in gas — Fog is an aerosol consisting of liquid droplets of water dispersed in a gas (air).

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Practice Unit 5: Solutions with a free chapter-wise online MCQ test for NEET NEET (All) CHEMISTRY. This chapter covers: Different methods for expressing the concentration of solution - molality molarity mole fraction percentage (by volume and mass both) the vapour pressure of solutions and Raoult's.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Unit 5: Solutions — Important Questions & Answers (FAQ)

Frequently asked questions from NEET NEET (All) CHEMISTRY — Unit 5: Solutions, with answers and explanations. These are sample questions; the exam has its own separate question set.

The mixture which shows positive deviation from Raoult’s law is:

A. Benzene + Toluene
B. Acetone + Chloroform
C. Chloroethane + Bromoethane
D. Ethanol + Acetone ✓

Answer: D. Ethanol + Acetone
Ethanol + Acetone shows positive deviation because the interaction between the components is weaker than the pure component interactions, leading to increased vapor pressure.

The mixture which shows positive deviation from Raoult’s law is:

A. Benzene + Toluene
B. Acetone + Chloroform
C. Chloroethane + Bromoethane
D. Ethanol + Acetone ✓

Answer: D. Ethanol + Acetone
Ethanol + Acetone is an example of a solution showing positive deviation from Raoult's law as the hydrogen bonds between ethanol molecules are weakened by the addition of acetone.

Match the List-I (Example) with List-II (Type of Solution). List-I: (A) Humidity, (B) Alloys, (C) Amalgams, (D) Smoke. List-II: (I) Solid in solid, (II) Liquid in gas, (III) Solid in gas, (IV) Liquid in solid.

A. A-II, B-IV, C-I, D-III
B. A-II, B-I, C-IV, D-III ✓
C. A-III, B-I, C-IV, D-II
D. A-III, B-II, C-I, D-IV

Answer: B. A-II, B-I, C-IV, D-III
Humidity is liquid in gas (A-II). Alloys are solid in solid (B-I). Amalgams are liquid in solid (C-IV). Smoke is solid in gas (D-III).

Which of the following aqueous solution will exhibit highest boiling point?

A. 0.01 M Urea
B. 0.01 M KNO3
C. 0.01 M Na2SO4 ✓
D. 0.015 M C6H12O6

Answer: C. 0.01 M Na2SO4
Boiling point elevation depends on the Van't Hoff factor (i) and concentration. i*c: (1*0.01)=0.01, (2*0.01)=0.02, (3*0.01)=0.03, (1*0.015)=0.015. 0.01M Na2SO4 gives the highest value.

Fog is a colloidal solution of: