Assertion: Cis-2-butene gives meso-2, 3-butanediol with dilute alkaline KMnO4 solution.
Reason : Dilute alkaline KMnO4 solution gives trans addition with alkenes.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : The presence of Ag+ enhances the solubility of alkenes in water.
Reason : Alkenes are weakly polar in nature.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
In the above sequence Y can be
3-nitrochlorobenzene
1-nitrochlorobenzene
4-nitrochlorobenzene
none of these
Which of the following species participate in sulphonation of benzene ring?
H2SO4
SO3
HSO
SO
B.
SO3
Most electrophilic substitution reactions are irreversible but sulphonation is an exception. Treatment of benzene with "oleum" (a solution of SO3 in conc. sulphuric acid) will give the sulphonic acid, the electrophile is sulphur trioxide (SO3).