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Which of the following haloalkanes is the most reactive towards nucleophilic sub

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Question: Which of the following haloalkanes is the most reactive towards nucleophilic substitution?

Options:

  1. 1-bromopropane
  2. 2-bromopropane
  3. 3-bromopropane
  4. bromobenzene

Correct Answer: 3-bromopropane

Solution: 

3-bromopropane is a tertiary haloalkane, which is more reactive towards nucleophilic substitution due to steric hindrance and stability of the carbocation formed.

Which of the following haloalkanes is the most reactive towards nucleophilic sub

Practice Questions

Q1
Which of the following haloalkanes is the most reactive towards nucleophilic substitution?
  1. 1-bromopropane
  2. 2-bromopropane
  3. 3-bromopropane
  4. bromobenzene

Questions & Step-by-Step Solutions

Which of the following haloalkanes is the most reactive towards nucleophilic substitution?
Correct Answer: 3-bromopropane
  • Step 1: Understand what haloalkanes are. Haloalkanes are organic compounds that contain carbon, hydrogen, and halogen atoms (like bromine).
  • Step 2: Identify the types of haloalkanes. There are primary, secondary, and tertiary haloalkanes based on the number of carbon atoms attached to the carbon that has the halogen.
  • Step 3: Know that tertiary haloalkanes (like 3-bromopropane) have three carbon atoms attached to the carbon with the halogen.
  • Step 4: Learn about nucleophilic substitution. This is a reaction where a nucleophile (a species that donates an electron pair) replaces the halogen in the haloalkane.
  • Step 5: Recognize that tertiary haloalkanes are more reactive in nucleophilic substitution because they can form a stable carbocation (a positively charged carbon) when the halogen leaves.
  • Step 6: Understand that steric hindrance (the crowding of atoms around the reactive site) makes it easier for the nucleophile to attack the carbocation in tertiary haloalkanes.
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