12th standard previous years question papers for the Chemistry

Can you provide me the 10th standard previous years question papers for the Chemistry???????

[Kiran Chandar]

This is the CBSE 12th standard previous years question papers for the Chemistry:

29. (a) Give reasons for the following:
(i) Bond enthalpy of F2 is lower than that of Cl2.
(ii) PH3 has lower boiling point than NH3.
(b) Draw the structures of the following molecules:
(i) BrF3 (ii) (HPO3)3
OR
(a) Account for the following:
(i) Helium is used in diving apparatus.
(ii) Fluorine does not exhibit positive oxidation state.
(iii) Oxygen shows catenation behavior less than sulphur.
(b) Draw the structures of the following molecules.
(i) XeF2 (ii) H2S2O8
30. (a) Although phenoxide ion has more number of resonating structures than
Carboxylate ion, Carboxylic acid is a stronger acid than phenol. Give two
reasons.
(b) How will you bring about the following conversions?
(i) Propanone to propane
(ii) Benzoyl chloride to benzaldehyde
(iii) Ethanal to but-2-enal







Remaining questions are in the attachment, download it freely from here:

Hello, I am the student of CBSE class 12th and Chemistry is very hard subject for me so please provide me the previous years question paper of it so that I can do preparation of it?

[Arun Vats]

Ok don’t worry here I am sharing the previous years question paper of CBSE class 12th Chemistry

Time duration: 3 hours
Maximum marks: 70

Weightage as per the form of questions is given below:
1. Long answer type questions- marks for each question is 5. Total number of questions is 3.

2. Short answer type questions- marks for each question is 3. Total number of questions is 9.

3. Short answer- marks for each question is 2. Total number of questions is 10.

4. Very short answer- marks for each question is 1. Total number of questions is 8.

Thus the total number of questions is 30 and total marks are 70.

CBSE Class 12 Chemistry Papers