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COMEDK2025ChemistryHaloalkanes and HaloarenesActual

Consider the following reaction Propyne + CH ₃ MgBr dry ether X Identify ' X ' from the following.

Options

  1. AMethane
  2. BBut-2-yne
  3. CBut-2-ene
  4. DPropane

Correct answer

A. Methane

Step-by-step solution

Propyne is CH₃-C CH . The terminal hydrogen atom in propyne is acidic because the carbon atom is sp hybridized. When propyne reacts with a Grignard reagent like CH₃MgBr , an acid-base reaction occurs where the Grignard reagent acts as a strong base and abstracts the acidic proton from the alkyne. CH₃-C CH + CH₃MgBr CH₃-C C⁻MgBr⁺ + CH₄ The product X formed is methane ( CH₄ ). Answer: Methane

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