50% NaOH is used in:
Correct answer: B. Cannizaro reaction
- A. Aldol condensation reaction
- B. Cannizaro reaction
- C. Clemenson condensation reaction
- D. Wolfkishner reaction
Explanation
According to PTB page 237, 50% concentrated NaOH solution is generally used in Cannizaro reaction as it is used for aldehydes which do not have α-H.
Last updated
About Reactivity of Aldehydes and Ketones
The polar carbonyl group makes aldehydes and ketones undergo nucleophilic addition, reduction and condensation reactions. Aldehydes are generally more reactive and oxidise readily to carboxylic acids, whereas ketones resist mild oxidation; reactions with hydrogen cyanide, sodium bisulfite and 2,4-DNP help identify their behaviour.
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.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A carbonyl compound with molecular formula C5H10O reacted with iodine in an alkaline solution to give a pale yellow precipitate with an antiseptic smell.The carbonyl compound is:
A diabetic person's exhaled breath contains propanone. A student tries to test the diabetes by asking the person to bubble the reagent with his exhaled breath. Which of the following reagents would give a positive result?
Acetadeftyde on oxidation by Na, Cr,O/H SO, gives:
Acetaldehyde cannot show
Acetaldehyde undergoes oxidation to produce acetic acid. In this reaction the oxidizing agent used is: