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The reaction intermediate involved in the addition of \(\mathrm{HBr}\) to propene in the absence of peroxides is:

Reductive ozonolysis of the alkene, ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{C}={\mathrm{CH}}_2$ will give:
1. Only ${\mathrm{CO}}_2$
2. Only ${\mathrm{CH}}_2\mathrm{O}$
3. Only ${\mathrm{CH}}_3-\mathrm{CHO}$
4. Mixture of ${\mathrm{CH}}_3\mathrm{CHO},\mathrm{HCHO} \mathrm{and} {\mathrm{CO}}_2$

The main product A and B in the above mentioned reaction are respectively- 
1. 
2. 
3. 
4. 

The structure of intermediate A in the following reaction is:

1.		2.
3.		4.

The reaction of C₆H₅CH =CHCH₃ with HBr produces:
1. \(C_{6} H_{5} \underset{Br}{\underset{\left|\right.}{CH}} CH_{2} CH_{3} \)
2. \(C_{6} H_{5} CH_{2} \underset{Br}{\underset{\left|\right.}{CH}} CH_{3} \) 
3. \(C_{6} H_{5} CH_{2} CH_{2} CH_{2} Br \)
4. 

Sabatier Senderen’s reaction is an example of-
1. Non thermic reaction                                
2. Exothermic reaction
3. Endothermic reaction                                
4. None of the above

Reaction of alkene and peracid gives oxirane. This reaction is named as-
1. Peroxidation                                   
2. Oxidation
3. epoxydation                                   
4. None

The oxidation of benzene by V₂O₅ in the presence of air produces:

     
The product B in the above-mentioned reaction is:

1.		2.
3.		4.

Cyclopentadiene is much more acidic than cyclopentane, because: