CBSE Class 12 Chemistry Question Paper 2022 Set 01 Solved

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Explore authentic exam materials through the CBSE Class 12 Chemistry Question Paper 2022 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.

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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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