What is the name of reaction when benzaldehyde changes in to benzyl alcohol?

• Cannizzaro's reaction

• Wurtz reaction

• Kolbe reaction

• Friedel-Craft's reaction

342.

Gammexane is

• benzene hexachloride

• bromo benzene

• benzyl chloride

• chlorobenzene

Aniline on treatment with HCl and NaNO₂ gives

• diazo salt

• nitroaniline

• chloroaniline

• aminophenol

Dehydration of alcohol involves

• carbene

• carbanion

• free radical

• carbonium ion

A sample of CHCl₃ before using as an anaesthetic is tested by

• AgNO₃ solution after boiling with KOH

• Ammonical cuprous chloride

• Fehling solution

• AgNO₃

What is the correct order of acidity from weakest to strongest acid for these compounds :

• I < IV < III < II

• III < IV < III < II

• IV < I < III < II

• II < III < I < IV

Lucas test is given by an alcohol within 5 minutes. 0.22 g of which liberates 56 mL of CH₄ at STP on treating with CH₃MgI. The structure of alcohol is

• CH₃ - CHOH - CH₃

• (CH₃)₂CH - CHOH - CH₃

• CH₃ - CH₂ - CHOH - CH₃

• (CH₃)₃C - CHOH - CH₃

The reaction in which phenol differs from alcohol is :

• it undergoes esterification with carboxylic acid

• it reacts with ammonia

• it forms yellow crystals of iodoform

• it liberates H₂ with Na metal

The reaction involved in the oil of winter green test is :

Salicylic acid   product

The product is treated with Na₂CO₃ solution. The missing reagent in the above reaction is :

• phenol

• NaOH

• ethanol

• methanol

(CH₃)₃COCH₃ and CH₃OC₂H₅ are treated with hydroiodic acid. The fragments obtained after reactions are respectively

• (CH₃)₃CI + CH₃OH; CH₃I + C₂H₅OH

• (CH₃)₃CI + CH₃OH; CH₃OH + C₂H₅I

• (CH₃)₃COH + CH₃I; CH₃OH + C₂H₅I

• CH₃I + (CH₃)₃COH; CH₃I + C₂H₅OH