The National Eligibility cum Entrance Test (NEET) is a crucial exam for medical aspirants in India. Among the many topics in Chemistry, Solutions is an important chapter in Physical Chemistry that frequently appears in NEET MCQs. This article provides a detailed collection of multiple-choice questions (MCQs) on Solutions along with key concepts to enhance your preparation.
Understanding Solutions in Chemistry
A solution is a homogeneous mixture of two or more substances. The solute dissolves in the solvent, forming a single-phase system. Solutions can exist in different states:
- Gaseous Solution – Gas in gas (e.g., air)
- Liquid Solution – Liquid in liquid (e.g., alcohol in water)
- Solid Solution – Solid in solid (e.g., alloys like brass)
Important Concentration Terms
- Molarity (M) = Moles of solute / Volume of solution (in L)
- Molality (m) = Moles of solute / Mass of solvent (in kg)
- Mole Fraction (χ) = Moles of a component / Total moles of all components
- Normality (N) = Equivalents of solute / Volume of solution (in L)
MCQs on Solutions for NEET Preparation
Basic Concepts of Solutions
Q1. Which of the following is a true solution?
A) Milk
B) Blood
C) Sugar in water
D) Colloidal gold
✔ Answer: C) Sugar in water
Q2. The term ‘solubility’ refers to:
A) The amount of solute that dissolves in a given amount of solvent
B) The rate of dissolution of a solute
C) The number of moles of solute in 1 liter of solution
D) The ratio of solute to solvent mass
✔ Answer: A) The amount of solute that dissolves in a given amount of solvent
Q3. Which factor does NOT affect solubility?
A) Temperature
B) Pressure
C) Nature of solute and solvent
D) Surface area of the beaker
✔ Answer: D) Surface area of the beaker
Molarity, Molality, and Concentration Terms
Q4. The molarity of a solution is defined as:
A) Moles of solute per kg of solvent
B) Moles of solute per liter of solution
C) Mass of solute per liter of solution
D) Mass of solute per kg of solvent
✔ Answer: B) Moles of solute per liter of solution
Q5. What is the molality of a solution prepared by dissolving 10 g of NaCl in 500 g of water? (Molar mass of NaCl = 58.5 g/mol)
A) 0.342 m
B) 0.428 m
C) 0.512 m
D) 0.684 m
✔ Answer: B) 0.428 m
Colligative Properties of Solutions
Q6. Colligative properties depend on:
A) The identity of the solute
B) The chemical nature of the solute
C) The number of solute particles in solution
D) The shape of the solute molecules
✔ Answer: C) The number of solute particles in solution
Q7. Which of the following is NOT a colligative property?
A) Osmotic pressure
B) Boiling point elevation
C) Freezing point depression
D) Viscosity
✔ Answer: D) Viscosity
Q8. A solution has a higher boiling point than a pure solvent due to:
A) Increase in vapor pressure
B) Decrease in vapor pressure
C) Increase in entropy
D) Increase in kinetic energy
✔ Answer: B) Decrease in vapor pressure
Raoult’s Law and Vapor Pressure
Q9. Raoult’s Law states that:
A) The vapor pressure of a solution is directly proportional to the mole fraction of the solvent
B) The vapor pressure of a solution depends on the boiling point of the solvent
C) The vapor pressure of a solution is independent of the solute concentration
D) The vapor pressure of a solution increases with the number of solute particles
✔ Answer: A) The vapor pressure of a solution is directly proportional to the mole fraction of the solvent
Q10. Which type of solution follows Raoult’s Law at all concentrations?
A) Ideal solution
B) Non-ideal solution
C) Dilute solution
D) Saturated solution
✔ Answer: A) Ideal solution
Osmosis and Osmotic Pressure
Q11. Osmosis is the movement of solvent molecules through a semipermeable membrane from:
A) Higher to lower concentration
B) Lower to higher concentration
C) Lower to lower concentration
D) Higher to higher concentration
✔ Answer: B) Lower to higher concentration
Q12. The van’t Hoff factor (i) represents:
A) The number of moles of solute in a solution
B) The ratio of actual number of particles to expected number of particles in a solution
C) The amount of solvent in a solution
D) The temperature dependence of solubility
✔ Answer: B) The ratio of actual number of particles to expected number of particles in a solution
NEET-Level MCQs for Practice
Q13. The freezing point of a solution is always:
A) Higher than that of the pure solvent
B) Lower than that of the pure solvent
C) The same as that of the pure solvent
D) Dependent only on temperature
✔ Answer: B) Lower than that of the pure solvent
Q14. What is the unit of osmotic pressure?
A) Pascal
B) Torr
C) atm
D) All of the above
✔ Answer: D) All of the above
Q15. A solution is said to be isotonic when:
A) Its osmotic pressure is higher than the surrounding solution
B) Its osmotic pressure is lower than the surrounding solution
C) Its osmotic pressure is equal to that of another solution
D) It has the highest concentration of solute
✔ Answer: C) Its osmotic pressure is equal to that of another solution
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Conclusion
Mastering Solutions and their properties is vital for NEET Chemistry. Regular practice of MCQs enhances conceptual understanding and problem-solving skills. NEET aspirants should focus on concentration terms, colligative properties, Raoult’s Law, and osmotic pressure for better performance in the exam.
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FAQs
Q1. Why is the concept of solutions important for NEET Chemistry?
✔ Answer: Solutions are a fundamental topic in physical chemistry, frequently appearing in NEET due to their real-life applications and numerical problem-solving scope.
Q2. What is the best way to memorize colligative properties?
✔ Answer: Understand their dependence on the number of solute particles and relate them to everyday phenomena like salt lowering the freezing point of water.
Q3. How can I improve my speed in solving NEET Chemistry MCQs?
✔ Answer: Practice solving problems regularly, use shortcut formulas, and take mock tests to improve time management.
Q4. What are ideal and non-ideal solutions?
✔ Answer: Ideal solutions obey Raoult’s Law at all concentrations, while non-ideal solutions show deviations due to solute-solvent interactions.
Q5. Where can I find more NEET MCQs on Chemistry?
✔ Answer: You can refer to NEET World for high-quality study material, mock tests, and expert guidance.
