The decreasing order of reactivity of the
following compounds towards nucleophilic
substitution (SN2) is :
A
(IV) > (II) > (III) > (I)
B
(II) > (III) > (IV) > (I)
C
(II) > (III) > (I) > (IV)
D
(III) > (II) > (IV) > (I)
2
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
The mechanism of SN1 reaction is given as :
A student writes general characteristics based
on the given mechanism as :
(a) The reaction is favoured by weak
nucleophiles.
(b) R+ would be easily formed if the
substituents are bulky.
(c) The reaction is accompanied by
racemization.
(d) The reaction is favoured by non-polar
solvents.
A
(a) and (b)
B
(a), (b) and (c)
C
(a) and (c)
D
(b) and (d)
3
JEE Main 2020 (Online) 2nd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
The major product obtained from
E2 - elimination of 3-bromo-2-fluoropentane is
A
B
C
D
4
JEE Main 2020 (Online) 2nd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Consider the reaction sequence given below:
Which of the following statements is true?
A
Changing the concentration of base will
have no effect on reaction (1)
B
Changing the concentration of base will
have no effect on reaction (2)
C
Changing the base from OH- to -OR will
have no effect on reaction (2)
D
Doubling the concentration of base will
double the rate of both the reactions
