Among the following compounds the one that is most reactive towards electrophilic nitration is
A
benzoic acid
B
nitrobenzene
C
toluene
D
benzene
Explanation
Due to electron releasing group like —R,
—OH etc. increases the electron density at ortho
and para position and thus makes the benzene
ring more reactive towards electrophile. On the
other hand, electron withdrawing groups like —
COOH, —NO2 etc. reduces electron density and
thus reduces the reactivity of benzene towards
electrophile. Thus, the order is
2
MCQ (Single Correct Answer)
AIPMT 2010 Prelims
In a set of reactions, ethylbenzene yielded a product D.
D would be
A
B
C
D
Explanation
3
MCQ (Single Correct Answer)
AIPMT 2010 Mains
Which of the following conformers for ethylene glycol is most stable?
A
B
C
D
Explanation
The conformation (d) is most stable because of intermolecular H-bonding.
4
MCQ (Single Correct Answer)
AIPMT 2010 Prelims
The reaction of toluene with Cl2 in presence of FeCl3 gives X and reaction in presence of light gives Y. Thus, X and Y are
A
X = Benzal chloride, Y = o-chlorotoluene
B
X = m-chloroluene, Y = p-chlorotoluene
C
X = o- and p-chlorotoluene,
Y = Trichloromethyl benzene
D
X = Benzyl chloride, Y = m-chlorotoluene
Explanation
Questions Asked from Hydrocarbons
On those following papers in MCQ (Single Correct Answer) Number in Brackets after Paper Name Indicates No of Questions
