Dehydration of alcohol involves

• carbene

• carbanion

• free radical

• carbonium ion

Aniline on treatment with HCl and NaNO₂ gives

• diazo salt

• nitroaniline

• chloroaniline

• aminophenol

What will be the product ,when carboxy phenol ,obtained by Reimer Tiemann's process ,is deoxidised with Zn powder ?

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

• Cannizzaro's reaction

• Wurtz reaction

• Kolbe reaction

• Friedel-Craft's reaction

Phenol , in Liebermann's nitroso test , give the colour :

• red

• yellow

• blue

• pink

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

• AgNO₃ solution after boiling with KOH

• Ammonical cuprous chloride

• Fehling solution

• AgNO₃

Which of following is the correct order of increasing reactivity?

• RCOOR' < RCOCl < RCONH₂

• RCOOR' < RCONH₂ < RCOCl

• RCOCl < RCONH₂ < RCOOR'

• RCONH₂ < RCOOR' < RCOCl

Gammexane is

• benzene hexachloride

• bromo benzene

• benzyl chloride

• chlorobenzene

Assertion: Phenol is a weaker acid than ethanol.
Reason: Groups with +M effect and -I effect decrease acidity at m-position.

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

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

• If the assertion is true but the reason is false.

• If both the assertion and reason are false.

10.

Assertion: Ethers behave as bases in the presence of mineral acids.

Reason: It is due to the presence of a lone pair of electrons on the oxygen.

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

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

• If the assertion is true but the reason is false.

• If both the assertion and reason are false.