An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism

• Secondary alcohol by S_N1

• Tertiary alcohol by S_N1

• Secondary alcohol by S_N2

• Secondary alcohol by S_N2

What is DDT among the following

• Greenhouse gas 

• A fertilizer

• Biodegradable pollutant

• Biodegradable pollutant

2–Hexyne gives trans–2–Hexene on treatment with

• Pt/H₂

• Li/NH₃

• Pd/BaSO₄

• Pd/BaSO₄

In the given transformation, which of the following is the most appropriate reagent?

• NH₂NH₂,O^-H

• Zn − Hg/HCl

• Na,Liq.NH₃

• Na,Liq.NH₃

Sodium ethoxide has reacted with ethanoyl chloride. The compound that is produced in the above reaction is

• Diethyl ether

• 2-Butanone

• Ethyl chloride

• Ethyl chloride

Consider the following bromides:



The correct order of S_N1 reactivity is 

• A > B > C

• B > C > A

• B > A > C

• B > A > C

The increasing order of the reactivity of the following halides for the S_N1 reaction is

• (III) < (II) < (I) 

• (II) < (I) < (III)

• (I) < (III) < (II)

• (I) < (III) < (II)

3-Methyl-pent-2-ene on reaction with HBr in presence of peroxide forms an addition product.The number of possible stereoisomers for the product is

• Six

• Two

• Zero

• Zero

479.

The major product obtained in the following reaction is

• C₆H₅CH (O^tBu) CH₂C₆H₅

• C₆H₅CH=CHC₆H₅

• (+)C₆H₅CH(O^tBu)CH₂H₅

• (+)C₆H₅CH(O^tBu)CH₂H₅

Arrange the carbanions   in order of their decreasing stability