In which of the following compounds, the C-Cl bond ionisation shall give most stable carbonium ions?

The reaction of C₆H₅CH=CHCH₃ with HBr produces

• 

• 

• C₆H₅CH₂CH₂CH₂Br

• 

A single compound of the structure is



obtainable from ozonolysis of which of the following cyclic compound?

Which of the following is a correct electron displacement for a nucleophilic reaction to take place? 

Given,


The enthalpy of hydrogenation of these compounds will be in the order as

• I>II>III

• I<II<III

• II>III>I

• II>III>I

Identity Z in the sequence of reactions.

• CH₃-(CH₂)₃-O-CH₂CH₃

• (CH₃)₂CH₂-O-CH₂CH₃

• CH₃(CH₂)₄-O-CH₂CH₃

• CH₃(CH₂)₄-O-CH₂CH₃

What products are formed when the following compounds is treated with Br₂ in the presence of FeBr₃?

In the following sequence of reactions,


the end product is (C) is

• acetone

• methane

• acetaldehyde

• acetaldehyde

189.

In the following reactions,



the major (A) and (C) are respectively

• 
• 
• 
• 

Which of the following reaction (s) can be used for the preparation of alkyl halides?

• I, III and IV

• I and II

• Only IV

• Only IV