What is the precise paper pattern (including marking scheme) for ISC Class 12 Chemistry ? Would be grateful if chapterwise/sectionwise marks scheme are given.Thanks in advance.

(1)
DESIGN OF THE QUESTION PAPER
CHEMISTR
Y
CLASS - XII
Time : Three Hours Max. Marks : 70
The weightage of the distribution of marks over different dimensions of the question paper shall be as follows:
A.
W
eightage to content/subject units
Unit Title
Marks
1. Solid state
4
2. Solutions
5
3. Electrochemistry 5
4. Chemical Kinetics 5
5. Surface Chemistry 4
6. General principles and process of Isolation of elements 3
7. p-Block Elements 8
8. d-and f-Block Elements 5
9. Coordination Compounds 3
10. Haloalkanes and Haloarenes 4
11. Alcohols, Phenols and Ethers 4
12. Aldehydes, Ketones and Carboxylic acids 6
13. Organic Compounds containing Nitrogen 4
14. Biomolecules 4
15. Polymers
3
16. Chemistry in Everyday life 3

(2)
C.
Scheme of Options
1. There will be no overall option.
2. Internal choices (either/or type) in five questions has been given in questions testing higher mental abilities in
the following types of questions :-
(i) One in two marks questions.
(ii) One in three marks questions.
(iii) All the three in five marks questions.
D.
Guidelines for Units 10-13 of syllabus.
These units include questions on:


Nomenclature : 2 marks


Reasoning : 6 marks


Distinguishing between compounds : 2 marks


Name reactions : 2 marks


Reaction Mechanism : 2 marks


Word problems (conversions) covering
Properties and reactions of functional groups : 5 marks
E.
Numericals :
Weightage of 8 -10 marks in total has been assigned to numericals.
F.
W
eightage to dif
ficulty level of questions
S.No.
Estimated difficulty
level
Percentage
1. Easy 15
2. Average 70
3. Difficult 15
A weightage of 20% has been assigned to questions which test higher order thinking skills of stu