Haloalkanes

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 S_N1 and S_N2. 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