1
MCQ (Single Correct Answer)

JEE Main 2016 (Online) 10th April Morning Slot

Which one of the following reagents is not suitable for the elimination reaction ?

A
NaOH/H2O
B
NaOEt/EtOH
C
NaOH/H2O-EtOH
D
NaI

Explanation


NaI will substitute bromide ion by iodine ion only.
2
MCQ (Single Correct Answer)

JEE Main 2017 (Offline)

The increasing order of the reactivity of the following halides for the SN1 reaction is :
A
(II) < (I) < (III)
B
(I) < (III) < (II)
C
(II) < (III) < (I)
D
(III) < (II) < (I)

Explanation

Since SN1 reactions involve the formation of carbocation as intermediate in the rate determining step, more is the stability of carbocation higher will be the reactivity of alkyl halides towards SN1 reaction.



Hence correct order is II < I < III.
3
MCQ (Single Correct Answer)

JEE Main 2017 (Offline)

Which of the following, upon treatment with tert-BuONa followed by addition of bromine water, fails to decolorize the colour of bromine?
A
B
C
D

Explanation

4
MCQ (Single Correct Answer)

JEE Main 2017 (Offline)

The major product obtained in the following reaction is :
A
C6H5CH = CHC6H5
B
(+) - C6H5CH(Ot-Bu)CH2C6H5
C
(-) - C6H5CH(Ot-Bu)CH2C6H5
D
($$ \pm $$) - C6H5CH(Ot-Bu)CH2C6H5

Explanation

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