CBSE Class 12 Chemistry Revision Worksheet Set B

CBSE Class 12 Chemistry Revision (2). CBSE issues sample papers every year for students for class 12 board exams. Students should solve the CBSE issued sample papers to understand the pattern of the question paper which will come in class 12 board exams this year. The sample papers have been provided with marking scheme. It’s always recommended to practice as many CBSE sample papers as possible before the board examinations. Sample papers should be always practiced in examination condition at home or school and the student should show the answers to teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers. 

1. Name the non-stoichiometric point defect responsible for colour in alkali halides?

2. What type of alignment in crystals makes them ferrimagnetic?

3. Write equation for the following reactions;

a) Wurtz – Fittig reaction

b) Friedel – Crafts acylation of Chlorobenzene

4. Explain the following terms:

a) Ferromagnetism

b) Tetrahedral void

5. A metallic oxide crystallizes in a hexagonal closed packed array of oxide ions with two out of every three octahedral voids occupied by the metal ions. Derive the formula of the metallic oxide.

6. An optically active compound having molecular formula C6H13Br reacts with aq.KOH to give a racemic mixture of products. Write the mechanism involved in the reaction.

7. a) Give a chemical test to distinguish between the following pairs of compounds:

Phenyl chloride and Benzyl chloride

b) Arrange the following compounds in the increasing order of the reactivity towards the reaction with caustic alkali:

Chlorobenzene, 4-chloro-1-methyl-benzene, 4- nitrochlorobenzene and 2,4,6-trinitrochlorobenzene

c) Write the IUPAC name of the following compound:

p- ClC6H4CH2CH(CH3)2

8. Copper crystallizes into an fcc lattice with edge length 3.61 x 10-8cm. Calculate the density of copper. [Given Cu = 63.5g mol-1]

9. a) Identify the chiral molecule in the following:

Pentan -2-ol or Pentan-3-ol

b) Give reason:

i) Haloalkanes react with KCN to form alkyl cyanides as main product while AgCN forms isocyanides as the chief product.

ii) Why is sulphuric acid not used during the reaction of alcohols with KI?

10. How will you bring about the following conversions:

a) 1- Bromopropane to 2,3- dimethylbutane

b) Ethanol to propanenitrile

c) tert-Butyl bromide to isobutylbromide

11. A sample of ferrous oxide has actual formula Fe0.93O1.00. In this sample what fraction of metal ions are Fe2+ ions? What type of non-stoichiometric defect is present in this sample?

Please click the link below to download full pdf file for CBSE Class 12 Chemistry Revision (2).



Click to View or Download pdf file
Click for more Chemistry Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

CBSE Board Exams in July Press Release

CBSE has released press note for the dates for the CBSE Board exams for Class 10. CBSE said “With regards to conduct of Class X examinations several queries are being received by the CBSE. In this context, it is once again reiterated that remaining examinations of...

Class 12 Board Exams Datesheet Announced

CBSE has announced the datesheet of the remaining class 12 board exams, see below:  

Checking of Boards Answer sheets starts today

CBSE has instructed almost 3000 schools to start the evaluation work for class 10th and class 12th board exam answer sheets from today. The checking of answer sheets for class 10th and class 12th was stopped earlier due to covid crisis in the country. Now in order to...

Board Cancelled Official CBSE Statement

Keeping in view the requests received from various State Governments and the changed circumstances as on date, following has been decided- 1. Examinations for classes X and XII which were scheduled from 1st July to 15th, 2020 stand cancelled. 2. Assessment of the...

CBSE Boards Paper Checking to Start

As per the announcement recently released by the Ministry of Home Affairs, at least 3000 CBSE affiliated selected as evaluation centers for board exam answer sheets will be allowed to open for the limited purpose of evaluation purposes only. The answer sheets for Board...

Studies Today