Ozonolysis Identification
Mediumchemistry
Alkene producing only ethanal upon ozonolysis is:
Select the correct option:
Solution
Incorrect! Answer:
But-2-ene (cis)
- Ozonolysis Reaction: Alkenes+O3→OzunideZn/H2OCarbonyl Compounds.
- Visual Logic: Simply 'cut' the double bond and place an Oxygen atom at each end of the fragments.
- Analyzing Options:
- But-2-ene (CH3−CH=CH−CH3): Symmetrical cleavage yields CH3CHO and CH3CHO (two ethanal molecules).
- But-1-ene (CH3−CH2−CH=CH2): Yields Propanal (CH3CH2CHO) and Methanal (HCHO).
- 2-Methylprop-1-ene ((CH3)2C=CH2): Yields Acetone ((CH3)2C=O) and Methanal.
- Ethene (CH2=CH2): Yields two Methanal molecules.
- Conclusion: Only But-2-ene satisfies the condition.
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About This Question
- Subject
- chemistry
- Chapter
- hydrocarbons
- Topic
- ozonolysis identification
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
But-2-ene (cis)
- Ozonolysis Reaction: Alkenes+O3→OzunideZn/H2OCarbonyl Compounds.
- Visual Logic: Simply 'cut' the double bond and place an Oxygen atom at each end of the fragments.
- Analyzing Options:
- But-2-ene (CH3−CH=CH−CH3): Symmetrical cleavage yields CH3CHO and CH3CHO (two ethanal molecules).
- But-1-ene (CH3−CH2−CH=CH2): Yields Propanal (CH3CH2CHO) and Methanal (HCHO).
- 2-Methylprop-1-ene ((CH3)2C=CH2): Yields Acetone ((CH3)2C=O) and Methanal.
- Ethene (CH2=CH2): Yields two Methanal molecules.
- Conclusion: Only But-2-ene satisfies the condition.
This medium difficulty chemistry question is from the chapter hydrocarbons, covering the topic of ozonolysis identification. It appeared in the 2025 exam.
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