CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set C

Read and download CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set C designed as per the latest question paper pattern and Class 12 examination guidelines issued by CBSE, NCERT and KVS. The past year Question Papers for Class 12 Chemistry have been provided with solutions which will help students to assess their performance and find out topics in Chemistry Class 12 which they need to improve to get better marks in Class 12 exams. After solving these last year papers also refer to solved Sample Papers for Class 12 Chemistry available on our website to build strong understanding of the subject

Chemistry Question Paper Class 12

Students can refer to the below Class 12 Chemistry Question Paper designed to help students understand the pattern of questions that will be asked in Class 12 exams. Please download CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set C

Chemistry Class 12 Question Paper

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

We hope you liked the above provided CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set C. To get an understanding of the type of questions which were asked in previous year exams, it is important for Class 12 students to refer to CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set C that we have provided above. Students can download all the Question Papers for Class 12 Chemistry which were issued in the exams so that you can practise them and solve all types of questions which have been asked till now. By doing all CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set C PYP (previous year papers) you will understand the regular questions and MCQ questions for Class 12 Chemistry which are always asked and learn them so that you can get full marks in those questions. You can download CBSE Class 12 Chemistry Previous Year Question Papers and Class 12 Chemistry Sample Papers in PDF. You should attempt all the last year question paper for Class 12 and Class 12 Chemistry MCQ Test in examination conditions at home and then compare their answers with the solutions provided by our teachers.
 

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