Solutions CBSE Class 12 PYQ Chapter Wise (2016–2026)

Explore: All CBSE Class 12 chapters · CBSE Class 12 Chemistry PYQs · CBSE Class 12 hub · Syllabus & pattern · Class 12 2026

Answer first

Solutions PYQs (previous year questions) for CBSE Class 12: Solutions (Chemistry) had 25 questions across the 50 official CBSE Class 12 papers we tagged (2016–2026), and appeared in 9 of them. Asked in 9 of 10 years. The concepts asked in the most papers: Freezing Point Depression, Colligative Properties, Raoult’s Law.

Year-wise question count

Asked in 9 of 10 years.

Most-asked concepts

Sorted by the number of papers a concept appeared in.

How to practise Solutions PYQs

1. Start with the concepts at the top of the table. They have come back the most.
2. Solve one year’s Solutions questions from the official PDF against the clock, then check the answer listed below.
3. Log every miss as a concept gap, a calculation slip or a misread. Each needs a different fix.
4. Once a concept is clean in two papers, move to the next. Then sit a full paper from the year pages.

Questions by year

Each line gives the question number and paper, type, concept, our one-line summary, with a link to the official PDF.

CBSE Class 122026

• Q.2 (Chemistry (56/1/1)) · MCQ · Freezing Point Depression: Which aqueous solution has the lowest freezing point PDF
• Q.13 (Chemistry (56/1/1)) · Assertion-Reason · Azeotropes: Why azeotrope components cannot be separated by distillation PDF
• Q.17 (Chemistry (56/1/1)) · Very short answer · Raoult's Law: Deviation type for phenol-aniline mixture and its effect on b.p. PDF
• Q.24 (Chemistry (56/1/1)) · Short answer · Boiling Point Elevation: B.p. of benzoic acid in CS2 with 88% dimerisation PDF

CBSE Class 122025

• Q.1 (Chemistry (56/1/1)) · MCQ · Abnormal Molar Mass: Effect of solute association on observed molar mass PDF
• Q.12 (Chemistry (56/1/1)) · MCQ · Osmosis: Why raw mango shrivels in concentrated salt solution PDF
• Q.17 (Chemistry (56/1/1)) · Very short answer · Raoult's Law: Pressure cooker reason; deviation type when mixing shrinks volume PDF
• Q.22 (Chemistry (56/1/1)) · Short answer · Colligative Properties: Freezing point of glucose solution from its boiling point PDF

CBSE Class 122024

• Q.4 (Chemistry (56/1/1)) · MCQ · Van't Hoff Factor: Van't Hoff factor for an electrolyte that associates PDF
• Q.13 (Chemistry (56/1/1)) · Assertion-Reason · Freezing Point Depression: Freezing point depression of water by NaCl and its dissociation PDF
• Q.31 (Chemistry (56/1/1)) · Long answer · Colligative Properties: Henry's constant, cells in saline, b.p. of partly ionised A2B3 solution PDF

CBSE Class 122023

• Q.1 (Chemistry (56/1/1)) · MCQ · Colligative Properties: Colligative property used for molar mass of polymers and proteins PDF
• Q.2 (Chemistry (56/1/1)) · MCQ · Henry's Law: Why blood oxygen is low at high altitude PDF
• Q.19 (Chemistry (56/1/1)) · Very short answer · Henry's Law: State Henry's law and give one application PDF
• Q.26 (Chemistry (56/1/1)) · Short answer · Raoult's Law: Ideal vs non-ideal solutions; vapour pressure of urea solution PDF

CBSE Class 122020

• Q.6 (Chemistry (56/1/1)) · Very short answer · Vapour Pressure: Which liquid has higher vapour pressure given their boiling points PDF
• Q.22 (Chemistry (56/1/1)) · Short answer · Osmotic Pressure: Osmotic pressure of a 5% urea solution at 300 K PDF
• Q.34 (Chemistry (56/1/1)) · Short answer · Freezing Point Depression: Mass of ascorbic acid to lower acetic acid freezing point by 1.5 C PDF

CBSE Class 122019

• Q.7 (Chemistry (56/1/1)) · Short answer · Raoult's Law: State Raoult's law and two features of an ideal solution PDF
• Q.16 (Chemistry (56/1/1)) · Short answer · Freezing Point Depression: Freezing point of glucose solution from sucrose solution data PDF

CBSE Class 122018

• Q.6 (Chemistry (56/1)) · Short answer · Freezing Point Depression: Freezing point of an aqueous glucose solution PDF
• Q.11 (Chemistry (56/1)) · Short answer · Colligative Properties: Reasons: osmotic pressure for macromolecules, gas solubility, KCl vs sugar PDF

CBSE Class 122017

• Q.25 (Chemistry (56/1)) · Long answer · Freezing Point Depression: Freezing point of glucose solution from sucrose data; define molality PDF

CBSE Class 122016

• Q.6 (Chemistry (56/1/N)) · Short answer · Colligative Properties: Colligative property for macromolecule mass; deviation giving min-boiling azeotrope PDF
• Q.15 (Chemistry (56/1/N)) · Short answer · Boiling Point Elevation: Boiling point of aqueous sodium sulphate solution with full ionisation PDF

Other Chemistry chapters

• The Solid State PYQs
• Electrochemistry PYQs
• Chemical Kinetics PYQs
• Surface Chemistry PYQs
• General Principles of Isolation of Elements PYQs
• The p-Block Elements PYQs
• The d- and f-Block Elements PYQs
• Coordination Compounds PYQs
• Haloalkanes and Haloarenes PYQs
• Alcohols, Phenols and Ethers PYQs
• Aldehydes, Ketones and Carboxylic Acids PYQs
• Amines PYQs
• Biomolecules PYQs
• Polymers PYQs
• Chemistry in Everyday Life PYQs

FAQ

How many Solutions questions come in CBSE Class 12?

In the official papers we tagged: 4 in 2026, 4 in 2025, 3 in 2024, 4 in 2023, 3 in 2020, 2 in 2019, 2 in 2018, 1 in 2017 and 2 in 2016. Not asked in the other year. That is 25 questions in all, about 9% of Chemistry.

Which Solutions topics repeat in CBSE Class 12?

Asked in the most papers: Freezing Point Depression, Colligative Properties, Raoult’s Law. The concept table lists every one with its count.

Are these official CBSE Class 12 questions?

Yes. Every question is from an official CBSE Class 12 paper hosted on our year pages. The one-line summaries are ours; open the PDF linked beside each question for the full text.