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The fastest ArSE reaction is given by?

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Important Questions on Hydrocarbons

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Alpha Question Bank for Medical: Chemistry>Chapter 22 - Hydrocarbons>Exercise 1>Q 167

The decreasing order of reactivity towards electrophilic substitution reaction of the following compounds is:

(i) benzene. (ii) chlorobenzene, (iii) nitrobenzene, (iv) toluene

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Alpha Question Bank for Medical: Chemistry>Chapter 22 - Hydrocarbons>Exercise 1>Q 168

Arrange the following compounds in the order of decreasing reactivity towards electrophilic substitution reaction.

Question Image Question ImageQuestion Image Question Image

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Alpha Question Bank for Medical: Chemistry>Chapter 22 - Hydrocarbons>Exercise 1>Q 169
In a compound Question Image electrophilic substitution has occurred. The substituent -E  are -methyl, -CH2Cl, -CCl3 and -CHCl2. The correct increasing order towards electrophilic substitution is
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Alpha Question Bank for Medical: Chemistry>Chapter 22 - Hydrocarbons>Exercise 1>Q 170
Select the correct statement.
(I) Ortho-and para-directing groups increase electron density at ortho-and para-positions mainly.
(II) Meta-directing groups increase electron density at meta-position mainly.
(III) Meta-directing groups decrease electron density at ortho pera position mainly.
(IV) Ortho-and. para-directing groups decrease electron density at meta-position.
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Alpha Question Bank for Medical: Chemistry>Chapter 22 - Hydrocarbons>Exercise 1>Q 171
A deactivating group
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Alpha Question Bank for Medical: Chemistry>Chapter 22 - Hydrocarbons>Exercise 1>Q 172
-NH2 group in aniline is:
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Alpha Question Bank for Medical: Chemistry>Chapter 22 - Hydrocarbons>Exercise 1>Q 173
Among the following groups, the group that deactivates the benzene ring. for further electrophilic substitution is:
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Alpha Question Bank for Medical: Chemistry>Chapter 22 - Hydrocarbons>Exercise 1>Q 174
o, p-directing group are mostly: