Chemistry 043 official model paper with key for CBSE 12th Board Exam 2023
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CBSE +2 Chemistry official sample question paper with answer key for CBSE class 12 Board exam 2023 attached below.

Some sample questions from CBSE XII th Chemistry Model Paper 2023 are:

1. The oxidation of toluene to benzaldehyde by chromyl chloride is called
a.    Etard reaction
b.    Riemer-Tiemann reaction
c.    Stephen's reaction
d.    Cannizzaro’s reaction

2. Given below are two statements labelled as Assertion (A) and Reason ®
Assertion (A): Proteins are found to have two different types of secondary
structures viz alpha-helix and beta-pleated sheet structure.
Reason ®: The secondary structure of proteins is stabilized by hydrogen
bonding.
Select the most appropriate answer from the options given below:
a.    Both A and R are true and R is the correct explanation of A
b.    Both A and R are true but R is not the correct explanation of A.
c.    A is true but R is false.
d.    A is false but R is true.

3.
a.    Name the suitable alcohol and reagent, from which 2-Chloro-2-methyl
propane can be prepared.
b.    Out of the Chloromethane and Fluoromethane , which one is has higher
dipole moment and why?

4. Give reasons for any 3 of the following observations:
a.    Aniline is acetylated before nitration reaction.
b.    pKb of aniline is lower than the m-nitroaniline.
c.    Primary amine on treatment with benzenesulphonyl chloride forms a
product which is soluble in NaOH however secondary amine gives product
which is insoluble in NaOH.
d.    Aniline does not react with methyl chloride in the presence of anhydrous
AICI3 catalyst.

Detailed +2 Chemistry question paper can be had from the below link.


Attached Files
.pdf   CBSE 12th Sample Question Paper 2023- Chemistry.pdf (Size: 214.32 KB / Downloads: 113)
.pdf   CBSE 12th Sample Paper 2023 answer key- Chemistry.pdf (Size: 365.83 KB / Downloads: 113)
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