Boat Conformation

Q. Least stable alkene among the following given alkenes is

1. 
2. 
3. 
4. $C{H}_3-CH=C{H}_2$

Q. Which conformation of cyclohexane is known to have 'flagpole hydrogens'?

1. Chair
2. Twist-boat
3. Boat
4. Half-chair

Q. Number of dibromo derivatives (excluding stereoisomers) possible for propane is:

Q.

What is the name of the cyclohexane conformation?

1. Chair

2. Half chair

3. Twist Boast

4. Boat

Q. Select the boat conformation from the following.

1. 
2. 
3. 
4. 

Q. Select the boat conformation from the following.

1. 
2. 
3. 
4. 

Q. The most stable from of trans-1, 2-dimethyl cyclohexane is:

1. (1e, 2e)
2. (1a , 2a)
3. (1e, 2a)
4. (1a, 2e)