CBSE Class 12 Chemistry Question Paper 2022 Set A Solved

Read and download CBSE Class 12 Chemistry Question Paper 2022 Set A Solved 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 Question Paper 2022 Set A Solved

Chemistry Class 12 Question Paper

1 What is the maximum possible coordination number of an atom in hcp crystal structure of an element?
 
2 How can a colloidal solution and true solution of the same colour be distinguished from each other?
 
3 Draw the noble gas species isostructural with ICl4
 
4 Write the IUPAC name of the following compound: 
CBSE Class 12 Chemistry Question Paper 2022 Set A Solved 3
 
5 Write chemical equation for the reaction of propanone with methylmagnesium bromide followed by hydrolysis.
 
6 What is meant by negative deviation from Raoult’s law? Draw a diagram to illustrate the relationship between vapour pressure and mole fraction of components in a solution to represent negative deviation.
 
7 Arrange the following in decreasing order of their basic strength:
(a) C6H5NH2, C2H5NH2, (C2H5)2NH, NH3
(b) Aniline, p-nitroaniline and p-toluidine
OR
Describe Hinsberg method for the identification of primary, secondary and tertiary  amines. Also write the chemical equations of the reactions involved.
 
8 Draw structures of the following:
(a) H3PO3 b) N2O5
 
9 Write the IUPAC names of the following complexes:
(a) [Cr (CN)6]3-
(b) K4 [ Fe (CN)6]
 
10 For a reaction :
CBSE Class 12 Chemistry Question Paper 2022 Set A Solved 1
(i) Write the order and molecularity of this reaction.
(ii) Write the unit of k.
 
11 Niobium crystallises in body-centred cubic structure. If it’s density is 8.55 g/cm3,calculate atomic radius of niobium using its atomic mass 93u.
 
12 100 g of liquid A (molar mass 140 g/mol) was dissolved in 1000 g of liquid B (molar mass 180 g/mol). The vapour pressure of pure liquid B was found to be 500 torr. Calculate the vapour pressure of pure liquid A and its vapour pressure in the solution if the total vapour pressure of the solution is 475 torr.
 
13 A first order reaction takes 10 minutes for 25% decomposition. Calculate half-life for the reaction.
(Given : log 2 = 0·3010, log 3 = 0·4771, log 4 = 0·6021)
 
14 Explain what happens when:
(a) An electrolyte is added to ferric hydroxide sol?
(b) Ferric chloride is added to freshly precipitated ferric hydroxide?
(c) Electric current is passed through a sol?
OR
Differentiate between:
(a) Physisorption and chemisorption.
(b) Coagulation and peptization.
(c) Lyophilic and lyophobic sols.
 
15 Write short note on:
(a) Zone refining.
(b) Mond process.
(c) Leaching of aluminium.
 
16 Give reasons:
(a) Oxygen has lesser tendency for catenation than Sulphur.
(b) ICl is more reactive than I2.
(c) SF6 is kinetically inert.
 
17 (a) For the complex [Fe(CN)6]3–, write the hybridization type, magnetic character and spin nature of the complex. (At. number : Fe = 26).
(b) Draw one of the geometrical isomers of the complex [Pt(en)2Cl2]2+ which is optically active.
 
18 Write chemical equation for the following reactions:
(a) Reimer - Tiemann reaction
(b) Kolbe’s reaction
(c) Williamson synthesis
 
19 Give plausible explanation for each of the following:
(a) Why are amines less acidic than alcohols of comparable molecular masses?
(b) Why do primary amines have higher boiling point than tertiary amines?
(c) Why are aliphatic amines stronger bases than aromatic amines?
 
20 There are three products possible in the following nucleophilic substitution reaction taking place at asymmetric carbon.
CBSE Class 12 Chemistry Question Paper 2022 Set A Solved 2
Name the process if:
(a) A is the only product formed.
(b) B is the only product formed.
(c) A and B both are formed
 
21 (a) Name the nitrogeneous base in which DNA differs from RNA.
(b) Name the vitamin whose deficiency causes bleeding gums.
(c) What is glycosidic linkage?
 
22 Draw structures and name the monomers of the following polymers:
(a) PVC
(b) Bakelite
(c) Nylon 6


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CBSE Class 12 Chemistry Question Paper 2022 Set A Solved

We hope you liked the above provided CBSE Class 12 Chemistry Question Paper 2022 Set A Solved. 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 Question Paper 2022 Set A Solved 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 Question Paper 2022 Set A Solved 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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