CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set C

Access and download CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set C, 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 C to begin your self-assessment today.

Chemistry Class 12 Question Paper PDF with Solutions

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.

CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set C

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Regularly practicing CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set C 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.

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