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Alkyl Halides - 4
1.
Secondary alkyl halides are those in which halogen atom is attached with a carbon atom which is further attached to
a) Two β-carbon
b) One β-carbon
c) Three β-carbon
2.
Over all order of reactivity of alkyl halides for a particular alkyl group is
a) Iodide>Bromide>Fluoride>Chloride
b) Chloride>Fluoride>Iodide>Bromide
c) Iodide>Bromide>Chloride>Fluoride
d) Fluoride>Chloride>Bromide>Iodide
3.
Reactions in which the halogen is replaced by some other atom or group of atoms are called
a) Addition reaction
b) β-Elimination
c) SN-reactions
d) Oxidation reaction
4.
Nucleophilic substitution reaction, which are completed in two steps are called as
a) E2
b) SN2
c) E1
d) SN1
5.
SN1 reaction occurs in
a) Tertiary
b) Primary R-X
c) All of these
d) Secondary R-X
6.
SN2 mechanism involves
a) 1
st
order kinetics
b) 2
nd
order kinetics
c) 3
rd
order kinetics
d) Zero order kinetics
7.
When a chiral alkyl halide is subjected to SN1 reaction, inversion of configuration takes place i.e
a) 80%
b) 60%
c) 50%
d) 40%
8.
In
b
-elimination reactions nucleophile attacks on
a) None of these
b)
b
-Hydrogen
c) Hydrogen
d)
a
-Hydrogen
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