CBSE Class 12 Chemistry Boards 2020 Question Paper Set 03 Solved

Chemistry
Download PDF

Class 12 Chemistry Solved Question Papers: CBSE Class 12 Chemistry Boards 2020 Question Paper Set 03 Solved

Review targeted exam resources with the CBSE Class 12 Chemistry Boards 2020 Question Paper Set 03 Solved. Built according to official CBSE standards for the 2026-27 academic year, these downloadable Class 12 Chemistry question papers support effective revision and performance tracking.

Download Class 12 Chemistry Question Paper PDF

Navigate directly to the solved Chemistry question papers using the digital viewer below. Each practice set includes detailed solutions, allowing students to instantly cross-check their work and identify areas requiring further revision.

SECTION A
Read the given passage and answer the questions number 1 to 5 that follow :

The d-block of the periodic table contains the elements of the groups 3 – 12 and are known as transition elements. In general, the electronic configuration of these elements
is (n – 1) d1–10 ns1–2. The d-orbitals of the penultimate energy level in their atoms receive electrons giving rise to the three rows of the transition metals i.e., 3d, 4d and 5d series.
However, Zn, Cd and Hg are not regarded as transition elements. Transition elements exhibit certain characteristic properties like variable oxidation states, complex formation, formation of coloured ions and alloys, catalytic activity, etc. Transition metals are hard (except Zn, Cd and Hg) and have a high melting point.
 
1. Why are Zn, Cd and Hg non-transition elements ?
 
2. Which transition metal of 3d series does not show variable oxidation states ?
 
3. Why do transition metals and their compounds show catalytic activity ?
 
4. Why are melting points of transition metals high ?
 
5. Why is Cu2+ ion coloured while Zn2+ ion is colourless in aqueous solution ?
 
Questions number 6 to 10 are one word answers :
 
6. Name the cell which was used in the Apollo Space Programme.
 
7. How many coulombs are required for the oxidation of 1 mol of H2O to O2 ?
 
8. Write the slope value obtained in the plot of ln[R] vs. time for a first order reaction.
 
9. Name the disaccharide which on hydrolysis gives two molecules of glucose.
 
10. Name the class of the synthetic detergent which is used in toothpaste.
 
Questions number 11 to 15 are multiple choice questions :
 
11. Which of the following is refined by the zone refining process ?
 
(A) Cu
 
(B) Zn
 
(C) Ge
 
(D) Sn
 
12. Racemisation occurs in
 
(A) SN2 reaction
 
(B) SN1 reaction
 
(C) Neither SN2 nor SN1 reactions
 
(D) SN2 reaction as well as SN1 reaction.
Please click on below link to download CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set C.

Free study material for Chemistry

Past Exam Papers & Solutions for Class 12 Chemistry

Download CBSE Class 12 Chemistry Boards 2020 Question Paper Set 03 Solved for Class 12 Chemistry

Review authentic examination papers for Class 12 Chemistry. Working through the CBSE Class 12 Chemistry Boards 2020 Question Paper Set 03 Solved allows learners to decode recurring question trends and familiarize themselves with official CBSE evaluation standards.

Master Marking Schemes and Time Management

Reviewing official papers clarifies the exact marking scheme and structural layout established by the CBSE, enabling students to structure answers for maximum score potential.

Offline Revision & Comprehensive Study Material

Download digital copies of these papers for convenient offline revision anywhere. Cross-check your completed steps against our expert solution guides to ensure complete accuracy.

FAQs

Where can I download the official PDF for CBSE Class 12 Chemistry Boards 2020 Question Paper Set 03 Solved?

The CBSE Class 12 Chemistry Boards 2020 Question Paper Set 03 Solved is available for download on StudiesToday.com. It includes complete set with all sections so that Class 12 students can practice with the exact same paper that came in the CBSE exams.

Are the solutions for CBSE Class 12 Chemistry Boards 2020 Question Paper Set 03 Solved based on the official CBSE marking scheme?

Yes, the solutions for CBSE Class 12 Chemistry Boards 2020 Question Paper Set 03 Solved are prepared by subject matter experts as per official marking scheme. Class 12 students will understand the structure of answers and 'step-marks' methodology Chemistry.

How does solving CBSE Class 12 Chemistry Boards 2020 Question Paper Set 03 Solved help in preparing for the 2026 exams?

Solving previous year papers like CBSE Class 12 Chemistry Boards 2020 Question Paper Set 03 Solved is important to understand repeat themes and question difficulty levels of Chemistry. It helps Class 12 students to test their time management skills too.

Can I access CBSE Class 12 Chemistry Boards 2020 Question Paper Set 03 Solved in different languages?

Yes, where applicable, CBSE Class 12 Chemistry Boards 2020 Question Paper Set 03 Solved is available in both English and Hindi mediums. All students from Class 12 can access Chemistry study material in their preferred language.

Is there a charge to download the CBSE Class 12 Chemistry solved papers?

No, all previous year question papers on StudiesToday, including CBSE Class 12 Chemistry Boards 2020 Question Paper Set 03 Solved, are provided free of charge in mobile-friendly PDF.