For this reaction, the question mark represents:
Correct answer: A. C2H5COCH3
- A. C2H5COCH3
- B. C2H5CH(CH3)OH
- C. CH3COCH3
- D. C2H5CH2CHO
Explanation
When HCN reacts with a ketone, two new bonds form. The H from HCN adds to 0 in C=O to form C-OH bond and -CN adds to C to form C- CN bond. The ketone is given in option A and C, but the one having the same number of carbon atoms as the product is in option A. The product formed is called 'cyanohydrin' and it has the CN and OH group on the same carbon.
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 pairs can be distinguished by Fehling's solution?
Mark the incorrect statement about aldehydes and ketones.
Which of the following does not give aldol condensation reactions?
Which of the following is correct statement regarding carbonyl compounds:
Acetaldehyde is purified by which method when prepared by alcohol in laboratory:
Why does hydrogen cyanide add to propanone but not to propene?