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1.

The dihedral angle of the least stable conformer of ethane is:

1.	60°	2.	0°
3.	120°	4.	180°

2.

The reaction, among the following, that cannot produce ethane is:
1. $C{H}_3-Cl \underset{dry ether}{\overset{Na}{\to }}$
2. $C{H}_3-COOH \underset{lime}{\overset{Soda}{\to }}$
3. $C{H}_3-COOK \underset{}{\overset{electrolysis}{\to }}$
4. $C{H}_3-C{H}_2-O-C{H}_2-C{H}_3\underset{HI}{\overset{Red P}{\to }}$

3.
This is an example of :
1. Nucleophilic addition 
2. Nucleophilic substitution 
3. Electrophilic addition 
4. Electrophilic substitution 
 

4. The number of acetylinilic bonds in the given compound is/are : 
  \(\begin{aligned} & HC \equiv C-C-CH = CH-C \equiv N \\ & ~~~~~~~~~~~~~~~~~~~~ \parallel \\ &~~~~~~~~~~~~~~~~~~~~O \end{aligned} \)
1. 2 
2. 3 
3. 1 
4. 4 

5. Identify the nonaromatic species among the following options.

1.		3.
2.		4.

6.

What is the product formed when n-heptane is heated with a mixture of Cr₂O₃ and Al₂O₃ at 600°C?

1.	Cyclohexane	2.	Cyclohexene
3.	Benzene	4.	Toluene

7.

The major product among the following reaction is:

1.		2.
3.		4.

8. The number of sigma and pi bonds present in toluene is:
1. \(10 \sigma\) and \(3 \pi\) bonds
2.  \(12 \sigma\) and \(3 \pi\) bonds
3. \(15 \sigma\) and \(3 \pi\) bonds
4.  \(6 \sigma\) and \(3 \pi\) bonds

9. Which of the following alkenes is the most stable? 
1. 
2. \(CH_3-CH=CH_2 \)
3. \(H_3C-CH=CH-CH_3 \)
4. 

10.

The reaction of toluene with Cl₂ in the presence of FeCl₃ gives 'X' and the reaction of toluene in the presence of light gives 'Y'. Hence, the products 'X' and 'Y' are:                                            
1. X= benzal chloride, Y=o-chlorotoluene
2. X=m-chlorotoluene, Y=p-chlorotoluene
3. X=o and p-chlorotoluene, Y= trichloromethyl benzene
4. X= benzyl chloride, Y=m-chlorotoluene