Introduction to Alkyl Halides

Select the correct IUPAC name.

• 4-chloro-5 methylhexane

• 2methyl-3-chloromethylhexane

• 4chloro-2-methylhexane

• 2-methyl-3-chloromethylhexane

Dehydrohalogenation of alkyl halide is an example of which of the following reaction?

• Free radical addition

• Elimination

• Nucleophilic substitution

• None

Pick out the most reactive alkyl halide for an SN1 reaction.

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Tags

NGSS.HS-PS1-5

Which of the following statement(s) is/are true for S_N1 reaction?

I. The rate of S_N1 reaction depends on concentration of alkyl halide

II. The rate of S_N1 reaction depends on concentration of nucleophile

III. S_N1 reactions of alkyl halides are favoured by non-polar solvents

• Only I

• Only II

• Only III

• Both I and III

Tags

NGSS.HS-PS1-5

From the following, pick out the potential energy profile for a S_N1 reaction.

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• 

Tags

NGSS.HS-PS1-4

Which of the following alkyl halides would you expect to undergo S_N1 reaction most rapidly ?

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• 
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• They will give same yield of substitution products

• None of them gives substitution products

Which of the following statement is FALSE about nucleophile?

• It is a lone pair donor
• It is a Lewis base
• Attracted to electron deficient carbon
• It must be a negatively charged ions

S_N2 reaction is favoured by 1 ° halogenoalkane due to

• nucleophile attack
• carbocation formation
• less bulky group and less steric hindrance
• bimolecular collision

S_N1 reaction is favoured by 3 ° halogenoalkane due to

• nucleophile attack
• less bulky group and less steric hindrance
• more stable carbocation formation
• bimolecular collision

The reaction mechanism shown below is

• S_N1 
• S_N2
• S_N1 and S_N2
• None of the above

Tags

NGSS.HS-PS1-5