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Reactions of alcohols: oxidation, esterification, dehydration, Lucas test

36 questions on Reactions of alcohols: oxidation, esterification, dehydration, Lucas test from the Alcohols, Phenols and Ethers chapter: 8 NEET level, 14 JEE Main, 14 JEE Advanced. Each one opens with its answer and solution.

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The Lucas reagent is NEET level
Ethanol is oxidised by PCC in CH2Cl2 to NEET level
Which of the following alcohols gives turbidity immediately with Lucas reagent at room temperature? NEET level
Ethanol heated with excess conc. H2SO4 at 443 K mainly gives NEET level
Butan-2-ol is passed over copper at 573 K. The major organic product is JEE Main level
3-Methylbutan-2-ol is heated with conc. H2SO4. The major alkene formed is JEE Main level
Which order correctly gives decreasing rate of reaction with HCl/ZnCl2 at room temperature? JEE Main level
Salicylic acid is warmed with ethanoic anhydride in the presence of a few drops of conc. H2SO4. The product (aspirin) is JEE Main level
(R)-Butan-2-ol is treated with SOCl2 in the presence of pyridine (the reaction proceeds by SN2 with inversion of the geometry at the stereocentre). The product ... JEE Main level
Which alcohol gives a carboxylic acid containing the same number of carbon atoms when refluxed with acidified K2Cr2O7? JEE Main level
Propane-1,2-diol is treated with HIO4. The products are JEE Main level
2-Methyl-1,1-diphenylpropane-1,2-diol, (C6H5)2C(OH)-C(OH)(CH3)2, is treated with dilute H2SO4 (pinacol rearrangement). The ionisation occurs at the carbon that ... JEE Advanced level
2,2-Dimethylpropan-1-ol (neopentyl alcohol) is heated with conc. HBr. The major product is JEE Advanced level
A diol of formula C5H12O2 consumes one mole of HIO4 and gives only methanal and butan-2-one. The diol is JEE Advanced level
Consider all the isomeric alcohols of molecular formula C5H12O that are oxidised by PCC in CH2Cl2 to ketones. Count enantiomers separately (each member of an en... JEE Advanced level
Which of the following alcohols are oxidised to ketones by PCC in CH2Cl2? JEE Advanced level
Which statements about the dehydration of alcohols with conc. H2SO4 are correct? JEE Advanced level
Which statements about esterification are correct? JEE Advanced level
Four alcohols are shaken separately with Lucas reagent (ZnCl2 in conc. HCl) at room temperature. Which one gives turbidity immediately? NEET level
Ethanol is treated with PCC in CH2Cl2. The main organic product is NEET level
Vapours of propan-2-ol are passed over hot copper at 573 K. The product is NEET level
Which of the following gives a yellow precipitate on warming with I2/NaOH? NEET level
Butan-2-ol is heated with conc. H2SO4 at 443 K. The major alkene formed is JEE Main level
Ethanol is heated with conc. H2SO4 at 413 K with the alcohol in excess. The main product is JEE Main level
Arrange the alcohols I = butan-2-ol, II = 2-methylpropan-2-ol, III = butan-1-ol in decreasing order of rate of reaction with ZnCl2/conc. HCl. JEE Main level
Which is the correct order of decreasing acidity of phenol, water, ethanol and 2-methylpropan-2-ol? JEE Main level
Ethanoic acid reacts with ethanol enriched in oxygen-18, CH3CH2-^18OH, in the presence of a few drops of conc. H2SO4. After equilibrium is reached the oxygen-18... JEE Main level
Cyclohexanol is heated with hot concentrated HNO3. The main organic product after ring cleavage is JEE Main level
(S)-Butan-2-ol is treated with SOCl2 in the presence of pyridine. The main product is JEE Advanced level
3-Methylbutan-2-ol is heated with conc. H2SO4. The major alkene is JEE Advanced level
2,2-Dimethylpropan-1-ol (neopentyl alcohol) is heated with conc. HBr. The main product is JEE Advanced level
Which of the following give a positive iodoform test with I2/NaOH? JEE Main level
Compound X, C4H10O, is optically active and gives a yellow precipitate with I2/NaOH. It gives turbidity with ZnCl2/conc. HCl only after about five minutes at ro... JEE Advanced level
Propene is treated with BH3 in THF and then H2O2/NaOH to give A. A is oxidised with PCC to B. B is treated with CH3MgBr followed by H3O+ to give C. C is treated... JEE Advanced level
One mole of methyl 3,4-dihydroxybutanoate, HOCH2-CH(OH)-CH2-COOCH3, is treated with a large excess of CH3MgBr in dry ether, followed by H3O+. Assume that each a... JEE Advanced level
Which of the following alcohols give 2-methylbut-2-ene as the major alkene on heating with conc. H2SO4 at 443 K? JEE Advanced level