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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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2007
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Q)
Which of the following is the correct order of decreasing
S
N
2
reactivity ? <br> (X = a halogen)
( A )
R
C
H
2
X
>
R
2
C
H
X
>
R
3
C
X
( B )
R
3
C
H
X
>
R
3
C
X
>
R
C
H
2
X
( C )
R
C
H
2
X
>
R
3
C
X
>
R
2
C
H
X
( D )
R
3
C
X
>
R
2
C
H
X
>
R
C
H
2
X
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