JEE Questions for Chemistry Alcohols Phenols And Ethers Quiz 7 - MCQExams.com

Dynamite is prepared by adsorbing nitroglycerine over saw dust while NH₄NO₃ or NaNO₃ is added to it to ensure the complete combustion of the materials.

Na reacts both with phenol and ethyl alcohol to evolve H₂ gas and hence cannot be used to distinguish phenol from ethyl alcohol, All the remaining reagents react only with phenol but not with ethyl alcohol and hence can be used for distinguishing phenol from ethyl alcohol.

—NO₂ and —COOH group being powerful electron–withdrawing groups, reduce the electron-density in the benzene ring and hence do not favour F.C. alkylation while CH₂CH₃ and OH groups being electron-donating increase the electron-density in the benzene ring and thus favour F.C alkylation. Thus option (c) is correct.

Due to H-bonding,the boiling point of ethanol is much higher than that of the isomeric diethyl ether.

3-Chloro-1, 2-epoxypropane.

Reimer-Tiemann reaction.

In Liebermann’s nitroso reaction colour changes occur as follows:
Brown or Red → deep blue → green

In presence of non-polar aprotic (non hydroxylic) solvents such as CHCl₃,CCl₄ etc. Br₂ reacts with phenol to give a mixture of o-and p-bromophenol.

Alcoholic iodine with NaOH gives iodoform

CH₃CH₂OH + 3I₂ + 4NaOH →CHI₃ + CH₃COONa + 3NaI + 3H₂O

Try Your Self

Ethanol is used to generate power, as an additive to motor fuel to act as fule for internalcobustion engine is called power alcohol, it has generally 80% of petrol and 20% of ethnol in the presence of small quantity of benzene.

The organic compound A is C₂H₅OH (i.e ethyl alcohol) because it is a colorless with pleasant adour with boiling point of 78^o C . Ethyl alcohol on heating with conc. H₂SO₄ gives ethene which is a colorless gas. This gas decolourise bromine water and alkaline  KMnO₄ .