Which one of the following test is given by both aldehyde and ketone?
Correct answer: C. 2, 4 DNPH test
- A. Silver mirror test
- B. Fehling's solution test
- C. 2, 4 DNPH test
- D. Benedict's solution test
Explanation
Both aldehydes and ketones give a positive result in the 2,4-DNP test. This test involves adding a solution of 2,4-dinitrophenylhydrazine (2,4-DNP) to the aldehyde or ketone compound. If the compound contains a carbonyl group, it will react with the 2,4-DNP reagent to form a yellow or orange precipitate. This color change indicates the presence of an aldehyde or ketone. The 2,4-DNP test is a common and useful way to identify these functional groups in organic compounds.
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
Both aldehydes and ketone are planar to the neighborhoods of carbonyl (C=O) group. Which one of the following bonds is distorted towards the oxygen atoms?
Which one of the following is also called silver mirror :
A student mixed ethyl alcohol with small amount of sodium dichromate and added to the hot solution of dilute sulphuric acid. A vigorous reaction took place. He disti.... the product formed immediately. What was the product?
Which reagent is responsible for the conversion of ketone to secondary alcohol:
Identify the compound, which give iodoform test:
2-propanol on oxidation yield: