When halogen is removed from an alkyl halide a carbocation is formed, identify the most reactive carbocation
Correct answer: D. Methyl carbocation
- A. Primary carbocation
- B. Secondary carbocation
- C. Tertiary carbocation
- D. Methyl carbocation
Explanation
Methyl Carbocation (CH₃⁺)Structure: Only has one carbon atom, with no alkyl groups to stabilize the positive charge.Stability: Least stable of all carbocations.Reactivity: Most reactive, because it desperately seeks stabilization.Reason: No hyperconjugation or inductive effect; the positive charge sits entirely on one carbon with no support.
Last updated
About Nucleophilic Substitution
Nucleophilic substitution replaces a leaving group in an alkyl halide when an electron-rich nucleophile attacks the carbon atom. The topic compares SN1 and SN2 mechanisms, including reaction conditions, substrate structure, solvent effects, nucleophile strength, carbocation formation and stereochemical changes, and distinguishes substitution from elimination.
Practise Alkyl Halides
458 free Alkyl Halides MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
50% inversion of configuration of molecules take place in a___________________?
A compound X undergoes the following reactions:X NaOH(aq)/heat > C4H10O Cr2O7(2-), H+(aq)/ heat> C4H8O.What is X?
A Grignard reagent is formed when an alkyl halide reacts with
A tertiary alkyl halide usually undergoes nucleophilic substitution by the SN1 mechanism because
Alkyl halides are considered to be very reactive compounds towards nucleophile because_________________?