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WorksheetsHalo alkanes and arenes
Total questions: 20
Worksheet time: 15mins
Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is
Electrophilic elimination reaction
Electrophilic substitution reaction
Free radical addition reaction
Nucleophilic substitution reaction
Which reagent will you use for the following reaction? CH3CH2CH2CH3 ⎯⎯→ CH3CH2CH2CH2Cl + CH3CH2CHClCH3
Cl2/UV light
NaCl + H2SO4
Cl2 gas in dark
Cl2 gas in the presence of iron in dark
Which of the following is an example of vic-dihalide?
Dichloromethane
1,2-dichloroethane
Ethylidene chloride
Allyl chloride
The position of –Br in the compound in CH3CH=CHC(Br)(CH3)2 can be classified as ____________.
Allyl
Aryl
Vinyl
Secondary
Chlorobenzene is formed by reaction of chlorine with benzene in the presence of AlCl3. Which of the following species attacks the benzene ring in this reaction?
Cl–
Cl+
AlCl3
[AlCl4]–
Ethylidene chloride is a/an ______________.
vic-dihalide
gem-dihalide
allylic halide
vinylic halide
A primary alkyl halide would prefer to undergo _____________.
SN1 reaction
SN2 reaction
α–Elimination
Racemisation
Which of the following alkyl halides will undergo SN1 reaction most readily?
(CH3)3C—F
(CH3)3C—Cl
(CH3)3C—Br
(CH3)3C—I
Which is the correct IUPAC name for CH3-CH(C2H5) -CH2-Br?
1-Bromo-2-ethylpropane
1-Bromo-2-ethyl-2-methylethane
1-Bromo-2-methylbutane
2-Methyl-1-bromobutane
What should be the correct IUPAC name for diethylbromomethane?
1-Bromo-1,1-diethylmethane
3-Bromopentane
1-Bromo-1-ethylpropane
1-Bromopentane
Which is the correct increasing order of boiling points of the following compounds? 1-Iodobutane, 1-Bromobutane, 1-Chlorobutane, Butane
Butane < 1-Chlorobutane < 1-Bromobutane < 1-Iodobutane
1-Iodobutane < 1-Bromobutane < 1-Chlorobutane < Butane
Butane < 1-Iodobutane < 1-Bromobutane < 1-Chlorobutane
Butane < 1-Chlorobutane < 1-Iodobutane < 1-Bromobutane
Which is the correct increasing order of boiling points of the following compounds?
1-Bromoethane, 1-Bromopropane, 1-Bromobutane, Bromobenzene
Bromobenzene < 1-Bromobutane < 1-Bromopropane < 1-Bromoethane
Bromobenzene < 1-Bromoethane < 1-Bromopropane < 1-Bromobutane
1-Bromopropane < 1-Bromobutane < 1-Bromoethane < Bromobenzene
1-Bromoethane < 1-Bromopropane < 1-Bromobutane < Bromobenzene
Arrange the above compounds in the increasing order of their densities
(a) < (b) < (c) < (d)
(a) < (c) < (d) < (b)
(d) < (c) < (b) < (a)
(b) < (d) < (c) < (a)
In which of the above molecules carbon atom marked with asterisk (*) is asymmetric?
(a), (b), (c), (d)
(a), (b), (c)
(b), (c), (d)
(a), (c), (d)
What is ‘A’ in the reaction?
Which of the carbon atoms present in the molecule given below are asymmetric?
a, b, c, d
b, c
a, d
a, b, c
Which of the statements are correct about above reaction?
(a) and (e) both are nucleophiles.
In (c) carbon atom is sp3 hybridised.
In (c) carbon atom is sp2 hybridised.
(a) and (e) both are electrophiles.
Which of the following statements are correct about the reaction intermediate?.
Intermediate (c) is unstable because in this carbon is attached to 5 atoms.
Intermediate (c) is unstable because carbon atom is sp2 hybridised.
Intermediate (c) is stable because carbon atom is sp2 hybridised
Intermediate (c) is less stable than the reactant (b).
Haloalkanes contain halogen atom (s) attached to the sp3 hybridised carbon atom of an alkyl group. Identify haloalkane from the following compounds.
2-Bromopentane
Vinyl chloride (chloroethene)
2-chloroacetophenone
Trichloromethane
Alkyl halides are prepared from alcohols by treating with
HCl + ZnCl2
Red P + Br2
H2SO4 + KI
All the above
