In the given reaction ,

R-OH + HX $\to$RX + H₂O

the order of reactivity of alcohols is:

• tertiary < secondary < primary

• tertiary > secondary > primary

• tertiary < secondary > primary

• secondary > primary > tertiary

A compound is soluble in conc. H₂SO₄ . It does not decolourise bromine in CCL₄ but in oxidised by chromic anhydride in aqueous H₂SO₄ with 2s , turning orange solution to blue green , afterward opaque. The original solution contains :

• a primary alcohol

• a secondary alcohol

• a tertiary alcohol

• an ether

Which of following is the correct order of increasing reactivity?

• RCOOR' < RCOCl < RCONH₂

• RCOOR' < RCONH₂ < RCOCl

• RCOCl < RCONH₂ < RCOOR'

• RCONH₂ < RCOOR' < RCOCl

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

• Cannizzaro's reaction

• Wurtz reaction

• Kolbe reaction

• Friedel-Craft's reaction

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

778.

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