CBSE Class 12 Chemistry Boards 2020 Question Paper Set 01 Solved

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Official CBSE Exam Papers for Class 12 Chemistry

Explore authentic exam materials through the CBSE Class 12 Chemistry Boards 2020 Question Paper Set 01 Solved. Tailored for Class 12 learners, utilizing these Chemistry previous year papers ensures thorough preparation and strengthens time management skills before final CBSE evaluations.

Solved Previous Year Papers for Chemistry

View or download the dedicated CBSE Class 12 Chemistry Boards 2020 Question Paper Set 01 Solved resource below. Engaging with these previous year papers under timed conditions ensures continuous academic progress and mastery of the 2026-27 exam format.

SECTION A
Read the given passage and answer the questions number 1 to 5 that follow :
 
The substitution reaction of alkyl halide mainly occurs by SN1 or SN2 mechanism. Whatever mechanism alkyl halides follow for the substitution reaction to occur, the polarity of the carbon halogen bond is responsible for these substitution reactions. The rate of SN1 reactions are governed by the stability of carbocation whereas for SN2 reactions steric factor is the deciding factor. If the starting material is a chiral compound, we may end up with an inverted product or racemic mixture depending upon the type of mechanism followed by alkyl halide. Cleavage of ethers with HI is also governed by steric factor and stability of carbocation, which indicates that in organic chemistry, these two major factors help us in deciding the kind of product formed.
 
1. Predict the stereochemistry of the product formed if an optically active alkyl halide undergoes substitution reaction by SN1 mechanism.
 
2. Name the instrument used for measuring the angle by which the plane polarised light is rotated.
 
3. Predict the major product formed when 2-Bromopentane reacts with alcoholic KOH.
 
4. Give one use of CHI3.
 
5. Write the structures of the products formed when anisole is treated with HI.
 
Questions number 6 to 10 are one word answers :

6. Identify which liquid will have a higher vapour pressure at 900C if the boiling points of two liquids A and B are 1400C and 1800C, respectively.
 
7. Out of zinc and tin, whose coating is better to protect iron objects ?
 
8. Will the rate constant of the reaction depend upon T if the Eact (activation energy) of the reaction is zero ?
 
9. Give the structure of the monomer of PVC.
 
10. Which structural unit present in a detergent makes it non-biodegradable ?
 
Questions number 11 to 15 are multiple choice questions :
 
11. Out of the following, the strongest base in aqueous solution is
 
(A) Methylamine
 
(B) Dimethylamine
 
(C) Trimethylamine
 
(D) Aniline
 
12. Iodoform test is not given by
 
(A) Ethanol
 
(B) Ethanal
 
(C) Pentan-2-one
 
(D) Pentan-3-one
 
13. Out of the following transition elements, the maximum number of oxidation states are shown by
 
(A) Sc (Z = 21)
 
(B) Cr (Z = 24)
 
(C) Mn (Z = 25)
 
(D) Fe (Z = 26)
 
14. Hardening of leather in tanning industry is based on
 
(A) Electrophoresis
 
(B) Electro-osmosis
 
(C) Mutual coagulation
 
(D) Tyndall effec
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Download CBSE Class 12 Chemistry Boards 2020 Question Paper Set 01 Solved for Class 12 Chemistry

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The CBSE Class 12 Chemistry Boards 2020 Question Paper Set 01 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 01 Solved based on the official CBSE marking scheme?

Yes, the solutions for CBSE Class 12 Chemistry Boards 2020 Question Paper Set 01 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 01 Solved help in preparing for the 2026 exams?

Solving previous year papers like CBSE Class 12 Chemistry Boards 2020 Question Paper Set 01 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 01 Solved in different languages?

Yes, where applicable, CBSE Class 12 Chemistry Boards 2020 Question Paper Set 01 Solved is available in both English and Hindi mediums. All students from Class 12 can access Chemistry study material in their preferred language.

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