Top Solutions Questions for NEET
The Top 5 Solutions Questions are among the most important and high-scoring numericals in NEET Chemistry. The chapter “Solutions” focuses on concentration terms, colligative properties, Raoult’s law, and abnormal molar mass. Every year, NEET asks at least one question from this topic, often involving direct formula application or conceptual clarity.
In this article, we will solve the Solutions Questions based on previous year NEET patterns, covering key concepts with tricks and shortcuts. A rapid revision section is also included to strengthen your preparation.
Top 5 Solutions Questions (Important PYQs with Solutions)
Question 1: Molarity Calculation
Calculate the molarity of a solution containing 10 g of NaCl in 500 mL solution.
Molar mass of NaCl = 58.5 g/mol
Moles = 10 / 58.5 ≈ 0.171 mol
Volume = 500 mL = 0.5 L
Molarity = Moles / Volume
= 0.171 / 0.5 ≈ 0.342 M
Answer: 0.342 M
This is a very common type in the Top 5 Solutions Questions, directly testing basic concentration concepts.
Question 2: Molality Calculation
Find molality of a solution containing 5 g solute dissolved in 100 g water. (Molar mass = 50 g/mol)
Moles of solute = 5 / 50 = 0.1 mol
Mass of solvent = 100 g = 0.1 kg
Molality = moles / kg solvent
= 0.1 / 0.1 = 1 m
Answer: 1 mol/kg
Molality-based numericals are frequently asked in the Top 5 Solutions Questions.
Question 3: Raoult’s Law
Calculate vapor pressure of solution when mole fraction of solvent = 0.8 and vapor pressure of pure solvent = 100 mmHg.
Using Raoult’s law:
P = X × P°
P = 0.8 × 100 = 80 mmHg
Answer: 80 mmHg
Raoult’s law is a direct formula-based concept in the Top 5 Solutions Questions.
Question 4: Elevation in Boiling Point
Calculate elevation in boiling point when Kb = 0.5 K kg/mol and molality = 2 m.
ΔTb = Kb × m
= 0.5 × 2 = 1 K
Answer: 1 K
Colligative property questions are highly important in the Top 5 Solutions Questions.
Question 5: Van’t Hoff Factor
A solution shows abnormal molar mass. If observed molar mass is half of expected, find Van’t Hoff factor.
i = Normal molar mass / Observed molar mass
= 1 / 0.5 = 2
Answer: 2
Van’t Hoff factor questions are very common in the Top 5 Solutions Questions.
Core Concepts Behind Top 5 Solutions Questions
To master the Top 5 Solutions Questions, understanding concentration terms and colligative properties is essential. The chapter revolves around how solutes affect physical properties of solvents.
Important formulas used in the Top 5 Solutions Questions include:
Molarity (M) = Moles / Volume (L)
Molality (m) = Moles / kg solvent
Raoult’s law: P = X × P°
Elevation in boiling point: ΔTb = Kb × m
Depression in freezing point: ΔTf = Kf × m
Van’t Hoff factor: i = Normal molar mass / Observed molar mass
These formulas must be revised regularly for fast problem-solving in NEET.
Additional Practice Questions (Concept-Based Rapid Revision)
To strengthen your preparation beyond the Top 5 Solutions Questions, solve these:
Find molarity if 1 mol solute is present in 1 L solution.
Answer: 1 M
Calculate molality if 2 mol solute is dissolved in 1 kg solvent.
Answer: 2 m
Find vapor pressure when mole fraction = 0.5 and P° = 200 mmHg.
Answer: 100 mmHg
Calculate ΔTf when Kf = 2 and m = 1.
Answer: 2 K
Find Van’t Hoff factor when substance dissociates into 3 particles.
Answer: 3
Which property depends only on number of particles?
Answer: Colligative property
Unit of molality?
Answer: mol/kg
Effect of dilution on molarity?
Answer: Decreases
Ideal solution obeys which law?
Answer: Raoult’s law
Boiling point increases due to?
Answer: Solute addition
Common Mistakes in Solutions Questions
While solving the Top 5 Solutions Questions, students often confuse molarity and molality, especially in unit conversion. A common mistake is forgetting to convert grams to kilograms in molality calculations. Many students also misuse Raoult’s law by taking wrong mole fractions. Errors in Van’t Hoff factor calculations are frequent, especially in dissociation and association problems. Ignoring unit consistency can also lead to incorrect answers.
Strategy to Master Top 5 Solutions Questions
To master the Top 5 Solutions Questions, focus on understanding formulas and practicing numerical problems regularly. Revise concentration terms daily and solve at least 15–20 questions. Pay attention to unit conversions and avoid skipping steps. Practice previous year NEET questions to understand patterns and improve speed.
The chapter “Solutions” is highly scoring, and with consistent practice, it becomes one of the easiest topics in NEET Chemistry.
FAQ
What is the most important topic in solutions for NEET?
Colligative properties and concentration terms are the most important.
How many questions come from solutions in NEET?
Usually 1 question appears every year.
Is solutions chapter difficult for NEET?
No, it is easy if formulas are clear and practiced.
How to improve solutions numericals?
Practice regularly and focus on unit conversions.