The major product of the following reaction is :

Freon used as refrigerant is

• CF₂=CF₂

• CH₂F₂

• CCl₂F₂

• CF₄

2-Phenylethylbromide when heated with NaOEt, elimination takes place. No deuterium exchange takes place when the reaction is carried out in C₂H₅OD solvent. The mechanism will be

• E1 elimination

• E2 elimination

• E1 cB elimination

• E2 or E1cB

For the following reactions,

i) CH₃ CH₂ CH₂Br + KOH --> CH₃CH=CH₂ +KBr +H₂O

ii)  


iii) 

• (i) is elimination reaction, (ii) is substitution reaction, and (iii) is addition reaction.

• (i) is elimination reaction, (ii) is addition reaction, (iii) is substitution reactions.

• (i) is substitution, (ii) addition reaction (iii) is addition reactions

• (i) is substitution, (ii) addition reaction (iii) is addition reactions

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