Class 12 Chemistry Chapter 1 MCQs – Solutions (NCERT Based)
Is post me aapko Solutions Chapter ke important MCQs milenge jo NCERT aur CBSE board ke pattern ke according banaye gaye hain. Har question ke saath answer aur short explanation bhi diya hai, taaki revision fast ho jaaye.
Useful topics: Raoult’s Law, Colligative Properties, Molarity / Molality, Vapour Pressure.
✅ Tip: Pehle khud solve karo, phir answer check karke apne weak points note kar lo.
Solution MCQs (NCERT Based)
Tap an option to check your answer. Correct option will turn green. Then use the three buttons for details.
Solutions (Class 12) MCQs – FAQs
Quick doubts clear karo. Answers short + exam-friendly.
1) Which topics are covered in Class 12 Chemistry Chapter 2 Solutions MCQs?
These MCQs cover colligative properties (ΔTb, ΔTf, osmotic pressure, vapour pressure lowering), Raoult’s law, Henry’s law, ideal vs non-ideal solutions, molality/molarity, van’t Hoff factor and basic numericals.
2) What are colligative properties in simple words?
Colligative properties depend mainly on the number of solute particles, not on what the solute is. Examples: boiling point elevation, freezing point depression, osmotic pressure and vapour pressure lowering.
3) Why is molality preferred over molarity in colligative properties?
Molality uses mass of solvent (kg), so it does not change with temperature. Molarity depends on volume, which can change with temperature.
4) What is Raoult’s law and when does it apply?
Raoult’s law says partial vapour pressure of a component is proportional to its mole fraction. It applies best to ideal solutions where A–B interactions are similar to A–A and B–B.
5) What is Henry’s law in one line?
At constant temperature, solubility of a gas in a liquid is proportional to its partial pressure above the liquid (P = kH × x).
6) What is van’t Hoff factor (i) and why is it important?
van’t Hoff factor (i) tells the effective number of particles in solution. Electrolytes dissociate into ions, increasing particle count, so colligative effects become larger.
7) Which solution shows higher osmotic pressure: NaCl or glucose at same molarity?
NaCl solution has higher osmotic pressure because it dissociates into ions (i ≈ 2), while glucose does not (i = 1). Osmotic pressure increases with particle count.
8) Do these Solutions MCQs include answers and explanations?
Yes. Each MCQ includes the correct option, final answer, short explanation and a Did You Know fact for quick revision.
9) Are these NCERT-based MCQs useful for CBSE board exams and competitive prep?
Yes. They are NCERT-aligned and help in board exam revision, concept clarity and practice of common numericals asked in CBSE-style questions.