Which will not react with phenol:
Correct answer: B. KMnO4/OH-
- A. NaOH
- B. KMnO4/OH-
- C. Br2
- D. Na
Explanation
Potassium permanganate (KMnO4)/OH- will oxidise phenol to form 1,4-dihydroxybenzene, also known as hydroquinone. This is because potassium permanganate is a strong oxidizing agent, and phenol is a reducing agent. The reaction is an oxidation-reduction reaction, and it produces hydroquinone and manganese dioxide.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Alcohols and Phenols
Alcohols are classified as primary, secondary or tertiary and studied through their hydrogen bonding, acidity, oxidation and reactions with active metals, acids and halogenating agents. Phenols require separate treatment because the hydroxyl group is attached to an aromatic ring, making their acidity and electrophilic substitution different from ordinary alcohols.
Practise Alcohols and Phenols
535 free Alcohols and Phenols 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 Alcohols and Phenols questions
The dehydration of ethyl alcohol with concentrated H2SO4 at 140°C gives:
Alcohol is less acidic than phenol due to:
The compound that reacts the slowest in Lucas test.
The order of reactivity of alcohols when C - O bonds break:
The question is given below:
Which one of the following alcohol is indicated by formation of yellow crystals in Iodoform test?