Alcohols, Phenols and Ethers

Dehydration of glycerol produces :

• propanone

• allyl alcohol

• glycol

• acrolein

In solvents like DMSO, acetonitrile, F^- ion of dissolved NaF is more reactive than in methyl alcohol becasue

• CH₃OH is more polar than DMSO and CH₃CN

• CH₃OH is less polar than DMSO and CH₃CN

• unsolvated F^- ion is DMSO or CH₃CN acts more efficiently as nucleophile

• -OH group is a better leaving group than F^- ion

In Oppenauer's oxidation,

• secondary alcohol is oxidised to carboxylic acid in acetone solvent using aluminium tertiary butoxide

• secondary alcohol is oxidised to carboxylic acid without affecting the C=C or C=C bond by aluminium tertiary butoxide in acetone solvent

• secondary alcohol is oxidised to ketone without affecting C=C or C=C bond by aluminium tertiary butoxide

• secondary alcohol is oxidised to ketone by chromic acid - pyridine complex.

Assertion : In fused state, calcium chloride cannot be used to dry alcohol or NH₃.

Reason : CaCl₂ is not a good dessicant.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

 $\underset{∆}{\overset{\mathrm{Soda} \mathrm{lime}}{\to }}$ A $\stackrel{?}{\to }$ Anisole

Reagent in second step should be :

• CH₃Cl

• KOH + C₂H₅OH

• KOH + C₂H₅SH

• KOH + Cl₂

Assertion : Ethers can be dried by using sodium wire.

Reason : Ethers do not react with sodium.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion: C₂H₅Br reacts with alcoholic solution of AgNO₂ to form nitroethane as the major product.

Reason : NO${}_2^{-}$ is an ambidient ion.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion : Esters which contain $\mathrm{\alpha }$-hydrogens undergo Claisen condensation.

Reason : LiAlH₄ reduction of esters gives acids.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

CH₃OC₂H₅ and (CH₃)₃C-OCH₃ are treated with hydroiodic acid. The fragments after reactions obtained are

• CH₃I + HOC₂H₅; (CH₃)₃C-I + HOCH₃

• CH₃OH + C₂H₅I; (CH₃)₃Cl + HOCH₃

• CH₃OH + C₂H₅; (CH₃)₃C-OH + CH₃I

• CH₃I + HOC₂H₅; CH₃I + (CH₃)₃C-OH

In which of the following reactions carbon-carbon bond formation takes place ?

• Cannizaro

• Reimer - Tiemann

• HVZ reaction

• Schmidt reaction