Home › CBSE Class 12 (Science) › Chemistry › Alcohols, Phenols and Ethers › Which reagent is used to sulphonate benzene befo…
Which reagent is used to sulphonate benzene before fusion with NaOH?
AAqueous NaOH solution
BZinc dust and heat
COleum, fuming H2SO4
DDilute HCl solution
Answer & Solution
Correct answer: C. Oleum, fuming H2SO4
Benzene sulphonic acid is made with oleum and then fused with molten NaOH to give sodium phenoxide.
Related questions
An ether with two different groups on oxygen, such as CH3-O-C2H5, is called what?Air fresheners and mouthwashes often contain phenols because phenols act as what?Which alcohol is used as an antifreeze in car radiators?Grignard reagents are commonly prepared in which solvent?Which compound was earlier used as a general anaesthetic in surgery?Why does diethyl ether have a small net dipole moment of 1.18 D?Lower ethers are known to be highly what?How do the boiling points of ethers change as molecular mass rises?