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WorksheetsHaloalkanes
Total questions: 20
Worksheet time: 11mins
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
A primary alkyl halide would prefer to undergo _____________.
SN1 reaction
SN2 reaction
α–Elimination
Racemisation
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).
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
What should be the correct IUPAC name for diethylbromomethane?
1-Bromo-1,1-diethylmethane
3-Bromopentane
1-Bromo-1-ethylpropane
1-Bromopentane
Haloalkane is a polar molecule that undergoes nucleophilic substitution through SN1 and SN2. Arrange the following haloalkanes in order of increasing rate of unimolecular nucleophilic substitution reaction:
I. 2-chloro-2-methylpropane
II. 2-chlorobutane
III. 1-chlorobutane
I< II < III
I< III < II
III< I < II
III< II < I
Compound C easily undergoes hydrolysis to form compound D, which forms 2-methylpropene when heated with concentrated sulphuric acid. Using the information above, proposed the structural formula for compound C
CH3CH2CH(Br)CH3
CH3CH2CH2CH(Br)CH3
CH3CH2(CH3)CH2Br
(CH3)2C(Br)CH3
Which of the following compounds is the rate of alkaline hydrolysis that is independent of the concentration of the hydroxide ion?
CH3CH2CH2CH2Cl
CH3CH(Br)CH3
C6H5CH2CH2I
(CH3)3CBr
A is a secondary haloalkane with formula C5H11Br and optically active. Identify A.
CH3CH2CH2CH2CH2Br
CH3CH(Br)CH2CH2CH3
(CH3)2C(Br)CH2CH3
(CH3)2C(Br)C(CH3)2CH2CH3
Is haloalkane polar or non polar?
polar molecules
non polar molecules
reactivity of haloalkanes towards SN2 mechanism
3° > 2° > 1°
3° < 2° < 1°
Which of the following is formed when 1-chloropropane reacts with ethanolic KOH
1-propanol
2-propanol
propene
propane
What would you make if you reacted CH3CH2MgBr (Grignard reagent) with methanal?
1-propanol
1-butanol
2-propanol
2-butanol
Nitriles can be formed by reacting haloalkanes with......
Amines
Amides
Sodium Cyanide or Potassium Cyanide
Potassium Nitrile
cyclopentanol reacts with SOCl2 produced
2-chlorocyclopentane
chlorocyclopentanoic acid
chlorocyclopentene
chlorocyclopentane
How would you classify 2-bromopropane as a haloalkane?
Primary
Secondary
Tertairy
Methyl
The name of the mechanism when 1-bromopropane reacts with aqueous sodium hydroxide is...
Nucleophilic addition
Nucleophilic substitution
Electrophilic addition
Electrophilic substitution
What is the organic product when 2-chlorobutane reacts with aqueous sodium hydroxide?
Butene
Butane
Butan-2-ol
Sodium butanoate
When 1-chloropropane reacts with a hot ethanolic solution of sodium hydroxide, the type of reaction is....
Nucleophilic substitution
Nucleophilic addition
Electrophilic addition
Elimination
When butan-2-ol reacts with aqueous sodium hydroxide the hydroxide ion acts as a....
Base
Nucleophile
Electrophile
Radical
