Solutions Practice Questions

Class 12 · Chemistry · 1874 free MCQs with instant results and detailed explanations.

1874

Total

603

Easy

914

Medium

357

Hard

Start Practicing Solutions

Take a timed quiz or customize your practice session

Quick Quiz (10 Qs) → Mock Test (25 Qs) ⚙ Customize

Topics in Solutions

Concentration Terms 301

Ideal and Non-ideal Solutions 571

Raoult's Law 495

Colligative Properties 507

Sample Questions from Solutions

Here are 10 sample questions. Start a quiz to get randomized questions with scoring.

Easy

Which of the following solutions has the highest concentration if all are 1 liter in volume?

A. 1 mole of NaCl

B. 0.5 moles of KCl

C. 2 moles of CaCl2

D. 0.75 moles of MgCl2

Show Answer & Explanation

Correct Answer: C

The concentration in terms of molarity is highest for 2 moles of CaCl2 because it dissociates into 3 ions (2 moles = 6 equivalents in total).

Easy

Which of the following is a common unit for expressing concentration?

A. Molarity

B. Velocity

C. Temperature

D. Pressure

Show Answer & Explanation

Correct Answer: A

Molarity is a widely used unit for concentration, defined as moles of solute per liter of solution.

Easy

If 10 g of NaCl is dissolved in 1 L of water, what is its molarity? (Molar mass of NaCl = 58.5 g/mol)

A. 0.171 M

B. 0.3 M

C. 0.5 M

D. 1 M

Show Answer & Explanation

Correct Answer: A

Molarity = moles of solute/volume of solution in liters. 10 g NaCl = 10/58.5 = 0.171 moles.

Medium

Calculate the number of moles in 150 grams of glucose (C6H12O6). Molar mass of glucose is 180 g/mol.

A. 0.5 moles

B. 0.75 moles

C. 1.0 moles

D. 1.5 moles

Show Answer & Explanation

Correct Answer: A

Number of moles = mass / molar mass. Here, 150 g / 180 g/mol = 0.833 moles.

Medium

If 4 g of KBr is dissolved in 100 mL of solution, what is its molarity? (Molar mass of KBr = 119 g/mol)

A. 0.2 M

B. 0.5 M

C. 1.0 M

D. 1.5 M

Show Answer & Explanation

Correct Answer: A

Moles of KBr = 4 g / 119 g/mol = 0.0336 moles. Molarity = moles/volume(L) = 0.0336/0.1 = 0.336 M.

Medium

Which of the following terms represents the amount of solute per 100 g of the solution?

A. Molarity

B. Molality

C. Mass percentage

D. Mole fraction

Show Answer & Explanation

Correct Answer: C

Mass percentage is defined as the mass of solute divided by the mass of solution times 100.

Medium

What is the mole fraction of solute in a solution containing 3 moles of solute and 6 moles of solvent?

A. 0.25

B. 0.33

C. 0.50

D. 0.67

Show Answer & Explanation

Correct Answer: A

Mole fraction of solute = moles of solute / (moles of solute + moles of solvent). Here, 3 / (3 + 6) = 0.333.

Hard

What is the molality of a solution containing 10 g of NaCl in 200 g of water? (Molar mass of NaCl = 58.5 g/mol)

A. 0.857 m

B. 1.000 m

C. 0.500 m

D. 1.500 m

Show Answer & Explanation

Correct Answer: A

Molality (m) is defined as moles of solute per kilogram of solvent. Here, moles of NaCl = 10g / 58.5g/mol = 0.171 mol. The mass of water is 0.200 kg, so molality = 0.171 mol / 0.200 kg = 0.857 m.

Hard

If the density of a solution is 1.2 g/mL and contains 2 moles of solute in 1 L of solution, what is the molarity?

A. 2 M

B. 1.67 M

C. 1.5 M

D. 2.5 M

Show Answer & Explanation

Correct Answer: A

Molarity (M) is defined as moles of solute per liter of solution. Here, it is given directly as 2 moles in 1 L, hence M = 2 M.

Q10

Hard

What is the concentration in mass percent of a solution containing 10 g of NaOH in 90 g of water?

A. 10%

B. 20%

C. 9.09%

D. 1.11%

Show Answer & Explanation

Correct Answer: A

Mass percent concentration is calculated as (mass of solute / total mass of solution) * 100. Here, mass of solution = 10 g + 90 g = 100 g, so mass percent = (10/100) * 100 = 10%.

Showing 10 of 1874 questions. Start a quiz to practice all questions with scoring and timer.

Practice All 1874 Questions →

More Chemistry Chapters

2219 Qs →

2264 Qs →

2282 Qs →

2454 Qs →

5 General Principles of Isolation of Elements

2721 Qs →

6 The p-Block Elements

2986 Qs →

7 The d and f Block Elements

2760 Qs →

8 Coordination Compounds

2567 Qs →

Other Class 12 Subjects

🧬 Biology → 📐 Mathematics → ⚡ Physics →

Solutions — Class 12 Chemistry Practice Questions Online

This page contains 1874 practice MCQs for the chapter Solutions in Class 12 Chemistry. The questions are organized by difficulty — 603 easy, 914 medium, 357 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 4 topics, giving you comprehensive coverage of the entire chapter.