New ! Chemistry MCQ Practise Tests



  1. Home
  2. 11th Standard
  3. Chemistry
  4. 11th Chemistry - Basic Concept of Organic Reactions Model Question Paper

Updated 11th Standard Chemistry Study Materials 2022-2023 Exams

11th Chemistry - Basic Concept of Organic Reactions Model Question Paper Question Bank Software Dec-14 , 2019

Basic Concept of Organic Reactions

11th Chemistry - Basic Concept of Organic Reactions Model Question Paper

Basic Concept of Organic Reactions Model Question Paper

11th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Chemistry

Time : 01:00:00 Hrs
Total Marks : 50
    5 x 1 = 5

  1. The most stable carbocation is ____________

    (a)

    CH3-CH-CH3

    (b)

    CH3-CH-CH2-CH3

    (c)

    CH3-CH-CH2-CH2-CH3

    (d)

    CH3-CH2-CH-CH2-CH

  2. The most stable carbanion is _____________

    (a)

    CH3-CH2

    (b)

    CH2 = CH

    (c)

    CH2 ≡ C

    (d)

    (CH3)2 - CH

  3. CH2 is an _________

    (a)

    Electrophile

    (b)

    Nucleophile

    (c)

    Free Radical

    (d)

    Ambiphiles

  4. The electrometric effect is ___________

    (a)

    Permanent effect

    (b)

    Temporary effect

    (c)

    p-electrons transfer in the effect

    (d)

    Both (b) and (c)

  5. The stability of alkyl free radicals is due to ___________

    (a)

    Hyperconjugation

    (b)

    +I effect

    (c)

    -I effect

    (d)

    Both a & b

    6. 5 x 2 = 10

  6. Write short notes on
    (i) +E effect and
    (ii) -E effect

  7. When does the carbon in an alkene molecule acquires a positive charge ? Explain.

  8. Why is benzylic free radical more stable than allylic free radical ?

  9. What are carbanions ?

  10. Differentiate the carbocation and carbanion.

    11. 5 x 3 = 15

  11. Illustrate with examples, the three types of electron movement in organic reaction.

  12. Explain the different types of substitution reactions or displacement reactions.

  13. Which of the following compounds will not exist as resonance hybrid? Give reason for your answer.
    (i) CH3 - OH
    (ii) R-CONH2
    (iii) CH3-CH = CH-CH2NH2

  14. Write structures of various carbocations that can be obtained from 2-methyl butane. Arrange these carbocations in order of increasing stability.

  15. The structure of triphenylmethyl cation is given below. This very stable and some of its salts can be stored for months. Explain the cause of high stability of this cation.

    16. 4 x 5 = 20

  16. Explain electron movement in organic reactions.

  17. Explain the types of addition reactions ?

  18. Explain the types of substitution reaction ?

  19. An organic compound (A) of a molecular formula C2H4 which is a simple alkene. A reacts with dil H2SO4 to give B. A again reacts with Cl2 to give C. Identify A,B and C and write the equations.

*****************************************

Reviews & Comments about 11th Chemistry - Basic Concept of Organic Reactions Model Question Paper

Write your Comment