Mastering Organic Chemistry (Class 12)

Somak Chatterjee|Mar 9th, 2014 07:50pm

Untitled drawing (5) (1)

 

Dear students,

With the chemistry exams approaching, your preparation must be at its peak. It is a general myth among the students that organic chemistry is the toughest topic to score marks in, however this is not the case. With only a few days left before the examination, the team of chemistry experts at Meritnation bring to you some really beneficial strategies to master this portion of the syllabus.

  • Focussing on NCERT questions: The NCERT Part – II comprises of organic chemistry and contributes to 28 marks in the examination.
  • An analysis of previous years’ question papers depicts that many questions are asked as it is from the NCERT textbooks.

The table given below shows the exact question numbers of the questions in the NCERT book which have been asked in the examination. Note that, many questions are being asked repeatedly.

Units

Marks

2012

2011

2010

2009

2008

2007

2006

Haloalkanes and Haloarenes

4

Example 10.2 (vi)

Table 10.1

Example 10.7

Example 10.6, 10.17

Ex 10.2 (i)10.9 (i), 10.14 (vii)

Alcohols, Phenols and Ethers

4

Exercise 11.5, 11.15

11.18 (ii), 11.31 (iv)

11.20 (ii, iv), 11.18 (i, iii)

11.3 (v)

11.3 (ii), 11.21 (ii, ii, vi)

11.22

Aldehydes, Ketones and Carboxylic Acids

6

Example 12.5 (i, iv),Exercise 12.10,Exercise 12.12, Exercise 12.13 (i, vi)

12.13 (i, iv), 12.16 (ii, iv), 12.17 (i, ii)

Fig 12.2, 12.11, 12.13 (iii, vii), 12.12 (i, ii)

12.16 (ii), 12.19, 12.17 (iv)

12.12 (ii), 12.17 (i, x, xi), 12.16 (ii, iii)

Table 12.1, 12.13 (i)

12.16 (ii), 12.13 (vii)

Amines

4

Exercise 13.7 (i and iii), Exercise 13.11 (ii, v)

13.4 (ii)

Table 13.1, 13.4 (i,ii, iii-a, iv)

Ex 13.4, 13.7 (iii, iv)

13.3 (I, iii, v)

13.12

13.2 (v)

Biomolecules

4

Exercise 14.12

14.12, 14.13

14.17, 14.22

14.12 (i), table 14.3

14.12 (i, iii), 14.10

14.12 (ii)

14.15, table14.3

Polymers

3

15.2

15.11

15.12

15.17

15.12, 15.16

15.12, 15.15

Chemistry in Everyday Life

3

Exercise 16.10

16.15

16.21 (i)

16.15, 16.17, 16.21 (i)

16.12, 16.22

16.15

So, mark these questions in the NCERT book and go through all the NCERT solutions thoroughly. For this you can also refer to the NCERT solutions section on meritnation.com

  • IUPAC Nomenclature questions: A conclusion from previous years’ papers is that, 90% of the questions related to nomenclature of organic compounds usually come from the tables of common and IUPAC names or in-text examples present in NCERT book. Below is a summarized chart of all the tables and in-text examples meant for nomenclature.
Haloalkanes and Haloarenes Table 10.1, example 10.1 and example 10.2
Alcohols, Phenols and Ethers Table 11.1, 11.2, example 11.1 and in-text question 11.3
Aldehydes, ketones and carboxylic acids Table 12.1 and intext questions 12.1, Table 12.3 and in-text question 12.6
Amines Table 13.1

Note: Do not leave even a single compound from the tables and in-text examples.

  • Name reactions: Important name reactions which have been asked previously are Sandmeyer reaction, Williamson synthesis, Riemer-Tiemann reaction, Kolbe’s reaction, Aldol Condensation, Cannizzaro Reaction, Clemmensen Reduction reaction, Hoffmann Bromamide reaction, Coupling reaction. So,we advise you to revise these reactions.
  • Distinction test: The distinction tests are usually asked between:
  • Aliphatic and aromatic compounds
  • Compounds having two different functional groups
  • Compounds having same functional group but different arrangement of atoms (e.g., 1°, 2°, 3°)

Steps for attempting these questions
Step – I: See how many marks are allotted to the question. Remember, 1 mark is for 1 test.
Step – II: Write the structural formulae of both the compounds.
Step – III: See where the two structures differ in.
Step – IV: Recall the reactions which you have studied.
Step – V: Apply those reactions in the compounds keeping in mind the skeletal structure they differ in.

  • Conversions: Conversion based questions are surely going to come in exams. Remember there can be multiple steps to reach the final product but the shortest and feasible steps have to be written in the answer-sheet.

Please note CBSE has yet not asked any conversion which consist of more than 3-steps.

Steps for attempting these questions
Step – I: Read the question very carefully.
Step – II: Write the starting compound on the left hand side and the final compound on the right hand side.
Step – III: See where do the two structure differ in.
(They mostly differ either in functional groups, number of carbon atoms or both)
Step – IV: Recall the reactions which you have studied.
Step – V: Apply those reactions in initial compound so as to reach to the final compound.

Expected areas from where questions can come in 2014

Unit Expected areas from where questions can be asked in 2014 examination
Haloalkanes and Haloarenes IUPAC Nomenclature, SN1 and SN2 reaction (Question: Which compound undergoes faster reaction?), DDT, Iodoform
Alcohols, Phenols and Ethers IUPAC Nomenclature, Conversions, Alcohols – Boiling points and solubilities, Phenols-Acidic properties, Difference in the boiling points of ethers and alcohols, Williamson reaction, Reimer-Tiemann reaction
Aldehydes, Ketones and Carboxylic Acids IUPAC Nomenclature, Nucleophilic addition on carbonyl carbon, Aldol Condensation, Cannizzaro reaction, Clemmensen reduction reaction, Acidity of carboxylic acids (Question: Arrange the following compounds in increasing/ decreasing order of their acidic trends.), Distinction tests, Conversions
Amines IUPAC Nomenclature, Basicities of amines (Question: Arrange the following amines in increasing/ decreasing order of their basic strengths.), Hoffmann Bromamide reaction, Coupling reaction, Aniline -Insoluble in water and does not undergo Friedel Crafts reaction
Biomolecules Glucose open chain and cyclic structure (Question: Why was the open chain structure of glucose unable to explain its properties?), Proteins-Primary, secondary, tertiary and quarternery structures, Vitamins – Sources and deficiency disease – table 4.3, nucleosides and nucleotides
Polymers Elastomer, thermoplastic and thermosetting polymer, Rubber, Nylon 6, nylon 6,6, teflon, bakelite, Buna-N
Chemistry in Everyday Life Detergents, Food preservatives, Enzymes, Antifertility drugs, Analgesics, Artificial sweetening agents, biodegradable and non-biodegradable detergents

To help all you students in these last stage of preparation, we are providing Conversion Schemes Distinction Tests Named Reaction in Detail and Named Reaction List.

Follow these simple but smart ways and give your 100 % in the examination.

Best of Luck!
Team Meritnation

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Add Comment Total Comments (34)

  • 1. Meritnation  |  March 22nd, 2017 at 10:59 am

    Hi Aksha,

    The syllabus hasn’t changed. We are sure that these important topics will help you. 🙂

    All the Best!

  • 2. aksha  |  March 21st, 2017 at 5:02 pm

    2017 ke liye wrk krenge ??????fast rply coz tym naa h if u cant den ur site is hell fr me

  • 3. bittu gupta  |  January 16th, 2017 at 10:03 pm

    thank u for help

  • 4. Ravi  |  December 12th, 2016 at 10:26 pm

    Thanks.It will help for both Prebaoard and Board exams.
    Name reaction in pdf format is wonderful.

  • 5. anali  |  September 18th, 2016 at 9:20 pm

    just silly

  • 6. anali  |  September 18th, 2016 at 9:18 pm

    thanks a little,i will try what i can find out

  • 7. Manan  |  March 7th, 2016 at 12:58 pm

    thanx a lot merit nation …..
    this had helped me a lot

  • 8. suraj  |  March 7th, 2016 at 9:13 am

    thank you for all this. its pretty helpful

  • 9. madhu priya  |  March 5th, 2016 at 6:45 pm

    it was very helpful in understanding organic in a superb way

  • 10. manisundaram  |  January 11th, 2016 at 10:17 pm

    it was really helpful to me

  • 11. abhishek meena  |  January 6th, 2016 at 10:11 pm

    is this helpful for 2016 chemistry board paper

  • 12. sugeet verma  |  November 10th, 2015 at 6:09 pm

    Thank u meritnation team . It is really really helpful to me

  • 13. Nived  |  March 11th, 2015 at 11:24 pm

    Just a day left to check whether the patter is being followed till now. 😀

  • 14. Sahil Parveez  |  March 4th, 2015 at 1:01 am

    Thank you Team – Meritnation.

  • 15. Nouman  |  February 25th, 2015 at 3:28 am

    THANKS A TON

  • 16. Reetik  |  February 24th, 2015 at 10:00 pm

    Nice one

  • 17. Manisha  |  February 22nd, 2015 at 9:06 pm

    Is this topics help me in 2015 board
    Also….. Please reply I am just waiting……..

  • 18. Preeti  |  February 20th, 2015 at 12:56 pm

    Thanks very much.
    It helped me a lot.

  • 19. Hiti Taneja  |  February 19th, 2015 at 6:09 pm

    Thank you. it is of great help.

  • 20. Hiti Taneja  |  February 19th, 2015 at 6:05 pm

    thank you..it is of great help.

  • 21. Nived  |  January 17th, 2015 at 8:09 pm

    OMG, it really helps……. always worried about this subject. 🙁

  • 22. Shiv  |  December 15th, 2014 at 7:42 pm

    Excelent material

  • 23. Aruna  |  March 18th, 2014 at 7:02 pm

    What about 4r math?

  • 24. Yogesh  |  March 11th, 2014 at 5:02 am

    tq…meritnation

  • 25. swathi krishna  |  March 10th, 2014 at 5:33 pm

    good help from meritnatiom , thank u

  • 26. shruti  |  March 10th, 2014 at 12:09 pm

    is this for 2014?
    it’s written 2012…

  • 27. shruti  |  March 10th, 2014 at 12:08 pm

    is this for 2014?
    cause it’s written 2012..

  • 28. kunal mandil  |  March 9th, 2014 at 5:00 pm

    thnzzz it’s very helpful

  • 29. Anubhav Verma  |  March 9th, 2014 at 2:48 pm

    Thank you meritnation experts, this is very helpful

  • 30. Animesh  |  March 9th, 2014 at 6:23 am

    Thnx a lot meritnation for ur help

  • 31. nitish das  |  March 9th, 2014 at 1:35 am

    is this above smart way applicable for cbse 2014 on chemistry paper all india set …

  • 32. Deepak Saxena  |  March 8th, 2014 at 11:48 pm

    its really really very helpful 😀

  • 33. priyam  |  March 8th, 2014 at 10:15 pm

    Thnx

  • 34. Anushka Das  |  March 8th, 2014 at 7:32 pm

    Thank you for your help meritnation.

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