The ozonolysis of 2-butene followed by a workup with Zn/H₂O yields:
Correct answer: B. Two molecules of acetaldehyde
- A. Two molecules of formaldehyde
- B. Two molecules of acetaldehyde
- C. One molecule of acetaldehyde and one of formaldehyde
- D. One molecule of propanal
Explanation
Reductive ozonolysis cleaves the carbon-carbon double bond and forms a carbonyl group on each of the original double-bonded carbons. Since 2-butene is a symmetrical alkene, this process cleaves it in the middle to produce two identical two-carbon molecules, which are acetaldehyde (ethanal) molecules.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Aldehydes and Ketones
Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
Practise Aldehydes and Ketones
679 free Aldehydes and Ketones MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Aldehydes and Ketones questions
Which of the following has the most acidic α-hydrogenatoms?
Aldehydes and ketones are generally soluble in water because:
Which of the following has the highest boiling point?
The reaction of benzaldehyde with HCN is an example of:
Acetaldehyde reacts with a Grignard reagent (CH₃MgBr)followed by hydrolysis to form:
What is the product when an aldehyde reacts with an alcohol in the presence of dry HCl gas?