CBSE Class 12 Chemistry Sample Paper 2020 Set 03 Solved

CBSE Class 12 Chemistry Sample Paper 2020 Solved Set C. 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 What happens to ferromagnetic substances when heated to a high temperature?

2 Arrange the following compounds in an increasing order of their solubility in water:

C₆H₅NH₂, (C₂H₅)₂NH, C₂H₅NH₂

3 Give the IUPAC name of

4 Write the structure of : 4 - methyl hex - 3 - en - 2 – one

5 The half life period for a reaction is halved as the initial concentration of the reactant is doubled.

a) What is the order of reaction ?

b) Give the unit of rate constant.

6 A reaction is I order wrt. A and II order wrt. B.

(a) Write differential rate equation.

(b) How is rate affected when concentration of B increases three times.

7 Define Reverse Osmosis and give its one application.

8 How would you obtain

(a) Picric acid from chlorobenzene,

(b) propene from propanone

9 The slope of a straight line plot of log [R] Vs.time was found to be -1.8 x10^-3 s^-1. What is the rate constant of the reaction

10 Describe the following giving one example for each:

(a) Anionic detergent

(b) Food preservative

11 a)From the given graph identify “X” and “Y”

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