CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set B

Access and download CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set B, carefully designed as per the latest 2025-26 examination guidelines issued by CBSE, NCERT, and KVS. These Class 12 Chemistry previous year question papers include detailed solutions, helping students to assess their performance and identify and improve key areas before the final exams.

Solved Chemistry Question Papers for Class 12

Practicing these Class 12 Chemistry question papers is the best way to understand the actual exam pattern and marking scheme. By solving these papers under timed conditions, Class 12 students can improve their speed and accuracy. Download the full CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set B to begin your self-assessment today.

Chemistry Class 12 Question Paper PDF with Solutions

SECTION A
 CHEMISTRY
Read the given passage and answer the questions number 1 to 5 that follow :
 
Organic compounds containing amine as functional group are present in a vivid variety of compounds, namely amino acids, hormones, neurotransmitters, DNA, alkaloids, dyes, etc. Drugs including nicotine, morphine, codeine and heroin, etc. which have physiological effects on humans also contain amino group in one form or another. Amines are basic because of the presence of lone pair of electrons on nitrogen.
 
Addition of nitrogen into an organic framework leads to the formation of two families of molecules, namely amines and amides. As chemistry students, we must appreciate the versatility of nitrogen.
 
1. What are amino acids ?
 
2. Why are amino acids amphoteric ?
 
3. Give one point of difference between acidic and basic amino acid.
 
4. What are essential amino acids ?
 
5. Name the linkage formed when carboxyl end of one amino acid condenses with amino end of other amino acid.
 
6. Name the process used for the benefaction of ores if the ore is soluble in some suitable solvent.
 
7. Give an example of a metal which can be purified by the process of distillation.
 
8. What type of isomerism is shown by the complex [Co(NH3)5 NO2] Cl2 ?
 
9. An organic compound is adsorbed on the surface of silica gel. Name the process of removing the organic compound from silica gel.
 
10. Calculate the overall order of the reaction whose rate law expression was predicted as :
Rate = k[NO]3/2 [O2]1/2
 
Questions number 11 to 15 are multiple choice questions :
 
11. 50 mL of an aqueous solution of glucose C6H12O6 (Molar mass : 180 g/mol) contains 6·02 x 1022 molecules. The concentration of the solution will be
 
(A) 0·1 M
 
(B) 0·2 M
 
(C) 1·0 M
 
(D) 2·0 M
 
12. If the standard electrode potential of an electrode is greater than zero, then we can infer that its
 
(A) reduced form is more stable compared to hydrogen gas.
 
(B) oxidised form is more stable compared to hydrogen gas.
 
(C) reduced and oxidised forms are equally stable.
 
(D) reduced form is less stable than the hydrogen gas.
 
13. Total number of unpaired electrons present in Co3+ (Atomic number = 27) is
 
(A) 2
 
(B) 7
 
(C) 3
 
(D) 5
Please click on below link to download CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set B.

CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set B

To understand the types of questions asked in past examinations, it is very important for Class 12 students to solve the CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set B provided above. You can easily download these past papers for Class 12 Chemistry in PDF format for the last 10 years. By practicing these actual exam questions you will gain an understanding of the difficulty level and the variety of topics covered over the years. By solving these Previous Year Papers (PYPs) you will understand both descriptive and MCQ questions in your final tests.

Importance of solving CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set B

Regularly practicing CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set B is the best way to improve your score in Class 12 Chemistry. These papers will give you details of the marking scheme and the paper structure used by the CBSE. By regularly attempting these under actual exam conditions at home, you can slowly improve your time management skills, which will help you to complete your Chemistry paper within the allowed duration.

Benefits of downloading CBSE Class 12 Question Papers

Having the CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set B in PDF format allows you to revise key concepts anywhere, even without an internet connection. These sets are a reliable tool to practice numerical problems and understand the correct approach to all types of answers. After solving the questions, you should compare your work with the solutions provided by our teachers. Along with these papers, students should always solve the Class 12 Chemistry Sample Papers and MCQ tests on studiestoday.com for a complete revision.

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

The CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set B 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 Solved Set B based on the official CBSE marking scheme?

Yes, the solutions for CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set B 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 Solved Set B help in preparing for the 2026 exams?

Solving previous year papers like CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set B 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 Solved Set B in different languages?

Yes, where applicable, CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set B 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 Solved Set B, are provided free of charge in mobile-friendly PDF.