Which substrate is appropriate for the preparation of methane and ethane in a single-step process?

1.  H₂C = CH₂

2. CH₃OH

3. CH₃-Br

4. CH₃-CH₂-OH

 $\stackrel{{\mathrm{Br}}_2/\mathrm{hv}}{\to }$ Monobromo derivatives

The number of possible monobromo products is (excluding stereoisomers):

1.  4     
2.  5 
3.  8
4.  10

 
1. \(\mathrm{CH}_3-\mathrm{CH}_3\)
2. \(\mathrm{CH}_2=\mathrm{CH}_2\)
3. \(\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}_2\)
4. None of the above.

Which of the following bromides is the major product of the reaction shown below, assuming that there are no carbocation rearrangement?
$+\mathrm{HBr} \underset{(1 \mathrm{Equivalent})}{\to } {\mathrm{C}}_{13}{\mathrm{H}}_{17}\mathrm{Br}$

_1. 

_2. 

_3.  

_4. 

What is a likely product of the reaction shown?

1. 

2. 

3. 

4. 

Which of the following, when undergoing addition of HBr, will form ONLY a pair of diastereomers?

Which of the following is the best stereochemical representation when reaction between 1 -methylcyclohexene and NBS react in aqueous dimethyl sulfoxide?

1.		2.
3.		4.	None of these

Di-imide (N₂H₂) is used to reduce double bond of:

(1)  $-\underset{|}{\mathrm{C}}=\mathrm{O}$               

(2) $-\mathrm{C}\equiv \mathrm{N}$             

(3) -NO₂           

(4) -CH=CH-

End product of the reaction is:-
(a)(b)

(c)      (d)