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Organic Chemist...

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  • Question 1
    4 / -1

    Heterolysis of a carbon-chlorine bond produces

  • Question 2
    4 / -1

    Which of the following is an electrophilic reagent?

  • Question 3
    4 / -1

    Which of the following sets of groups contains only electrophiles?

  • Question 4
    4 / -1

    Inductive effect involves

  • Question 5
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    The increasing order of electron donating inductive effect of alkyl groups is

  • Question 6
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    Inductive effect of which atom or group is taken as zero to compare inductive effect of other atoms?

  • Question 7
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    Maximum -I effect is exerted by the group

  • Question 8
    4 / -1

    Which one of the following acids would you expect to be the strongest?

  • Question 9
    4 / -1

     Few pairs of molecules are given below. Which bond of the molecule of the pairs is more polar?
    (i) H3C - H, H3C - Br
    (ii) H3C-NH2,H3C-0H
    (iii) H3C - OH, H3C - SH
    (iv) H3C - Cl, H3C - Br

  • Question 10
    4 / -1

    Which of the following is the correctorder of acidity of carboxylic acids?
    (i) CI3CCOOH > CI2CHCOOH > CICH2COOH
    (ii) CH3CH2COOH > (CH3)2CHCOOH > CCH3)3CCOOH
    (iii) F2CHCOOH > FCH2COOH > CICH2COOH

  • Question 11
    4 / -1

    Point out the incorrect statement about resonance?

  • Question 12
    4 / -1

    Which of the following ions is the most resonance stabilised?

  • Question 13
    4 / -1

    Hyperconjugation is

  • Question 14
    4 / -1

    The number of hyperconjugating structures shown by the carbocations are given below. Which one is not correctly matched?

  • Question 15
    4 / -1

    In which of the following species hyperconjugation is possible?

  • Question 16
    4 / -1

    Answer the following question based on the given paragraph.
    Stability of carbocation, alkylfree radical and alkene can be explained on the basis of hyperconjugation.
    In all these cases, there is presence ofhydrogen atom at theadjacent carbon atom ofsp2 hybridised carbon atom. Total number of hyperconjugating structures depends upon the number of hydrogen atoms present at adjacent carbon atom of sp2 C-atom.
    More the hyperconjugating structures, more is the stabihty of the ion.

    Decreasingorder of stabilityof following alkenes is
    (i) CH3 - CH = CH2
    (ii) CH3 - CH = CH - CH3
    (iii) 
    (iv) 

  • Question 17
    4 / -1

    Which of the following alcohols on dehydration gives most stable carbocation? 

  • Question 18
    4 / -1

    Which of the following contains three pairs of electrons in valence shell?

  • Question 19
    4 / -1

    Stability of alkyl carbocations can be explained by

  • Question 20
    4 / -1

    In the given reaction two products are expected.

    The product (B) is formed as a major product because

  • Question 21
    4 / -1

    The carbocation is less stable than

  • Question 22
    4 / -1

    Complete the following reactions by filling most stable intermediate and the product.
    (i) 
    (ii) 

  • Question 23
    4 / -1

    Which of the following statements is not true about the stability of carbanions?

  • Question 24
    4 / -1

    Which of the following carbanion expected to be most stable?

  • Question 25
    4 / -1

    The order of decreasing stability of the following carbanions is
    (i) (CH3)3C-
    (ii) (CH3)2CH-
    (iii) CH3CH-2
    (iv) C6H5CH-2

  • Question 26
    4 / -1

    Free radicals can undergo

  • Question 27
    4 / -1

    The most stable free radical among the following Is

  • Question 28
    4 / -1

    Which of the following Is a characteristic feature of a free radical?

  • Question 29
    4 / -1

    The increasing order of stability of the following free radicals is

  • Question 30
    4 / -1

    Which of the following is a false statement?

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