Question:
The most acidic hydrogen is present in
The most acidic hydrogen is present in
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Acidity Order: Alkyne $>$ Alkene $>$ Alkane.
Updated On: Apr 27, 2026
- propene
- 1, 3-butadiene
- 2-butyne
- propyne
- n-butane
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The Correct Option is D
Solution and Explanation
Step 1: Concept
Acidity of hydrocarbons depends on the s-character of the carbon atom.
Step 2: Meaning
Terminal alkynes ($sp$ hybridized) have the highest s-character (50%).
Step 3: Analysis
Propyne is a terminal alkyne with a hydrogen attached to an $sp$ carbon, making it more acidic than alkanes or alkenes.
Step 4: Conclusion
Hence, the correct answer is propyne.
Final Answer: (D)
Acidity of hydrocarbons depends on the s-character of the carbon atom.
Step 2: Meaning
Terminal alkynes ($sp$ hybridized) have the highest s-character (50%).
Step 3: Analysis
Propyne is a terminal alkyne with a hydrogen attached to an $sp$ carbon, making it more acidic than alkanes or alkenes.
Step 4: Conclusion
Hence, the correct answer is propyne.
Final Answer: (D)
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