NEETChemistrySome Basic Concepts of Organic ChemistryMCQ+4 / −1
The order of decreasing reactivity towards an electrophilic reagent, for the following would be
(i) benzene
(ii) toluene
(iii) chlorobenzene
(iv) phenol
(i) benzene
(ii) toluene
(iii) chlorobenzene
(iv) phenol
- A(ii) > (iv) > (i) > (iii)
- B(iv) > (iii) > (ii) > (i)
- C(iv) > (ii) > (i) > (iii)
- D(i) > (ii) > (iii) > (iv)
View written solutionFree
Correct answer: C
Benzene having any activating group, i.e.,
OH, R etc. undergoes electrophilic substitution
very easily as compared to benzene itself. Thus,
toluene (C6H5CH3) and phenol (C6H5OH) undergo
electrophilic substitution very readily than benzene.
Chlorine with +E and +M effect deactivates the
ring due to strong –I effect. So, it is difficult to
carry out the substitution in chlorobenzene than in
benzene, so correct order is
(iv) > (ii) > (i) > (iii)
More from Some Basic Concepts of Organic Chemistry
- For (i) I, (ii) Cl, (iii) Br, the increasing order of nucleophilicity would be2007 · MCQ
- If there is no rotation of plane polarised light by a compound in a specific solvent, through to be chiral, it may mean than2007 · MCQ
- The IUPAC name of is Includes diagram2006 · MCQ
- Which one of the following pairs represents stereoisomerism?2005 · MCQ
- Which amongst the following is the most stable carbocation?2005 · MCQ
- The chirality of the compound Includes diagram2005 · MCQ
- Names of some compounds are given. Which one is not in IUPAC system?2005 · MCQ
- The best method for the separation of naphthalene and benzoic acid from their mixture is2005 · MCQ