Quiz on Haloalkanes

What happens when a nucleophile replaces the halogen atom?

• Substitution reaction occurs

• Elimination reaction occurs

• No reaction occurs

List some common nucleophiles in nucleophilic substitution reactions.

• CN-

• NH3

• ROH

• H2O

• OH-

What is the order of strength of nucleophiles?

• NC- > RO- > HO- > NH3 > CH3COO- > ROH > H2O

• H2O > ROH > CH3COO- > NH3 > HO- > RO- > NC-

• NH3 > HO- > RO- > NC- > CH3COO- > ROH > H2O

What are the two types of nucleophilic substitution mechanisms?

• SN1 and SN2

• E1 and E2

• SN1 and E2

What does the term unimolecular mean in the context of SN1 mechanism?

• Only one type of molecule is involved in the rate determining step

• Two types of molecules are involved in the rate determining step

• The reaction is first order

What is the reactivity order of haloalkanes towards SN1 mechanism?

• Methyl < 1o < 2o < 3o

• 3o > 2o > 1o > Methyl

• 1o < 2o < 3o < Methyl

What is the rate of reaction for SN2 mechanism dependent on?

• Concentration of haloalkane and nucleophile

• Only concentration of nucleophile

• Only concentration of haloalkane

What effect does steric hindrance have on nucleophilic attack in SN2 reactions?

• It slows down the reaction rate

• It speeds up the reaction rate

• It has no effect

What is the mechanism of SN2 reaction?

• One-step mechanism

• Two-step mechanism

• Three-step mechanism

What is the comparison between SN1 and SN2 reactions?

• SN1 is a two-step mechanism, SN2 is a one-step mechanism

• SN1 is a one-step mechanism, SN2 is a two-step mechanism

• Both are one-step mechanisms