Conformations of Butane

Q.

If this is Energy vs Dihedral angle graph of Butane, then I, II and III are respectively :

1. Anti, Eclipsed, Gauche

2. Fully Eclipsed, Anti, Gauche

3. Gauche, Anti, Eclipsed

4. Fully Eclipsed , Gauche , Anti

Q.

Fully eclipsed conformation of butane is :

1. 

2. 

3. 

4. 

Q.

Gauche Conformation of butane is:

1. 

2. 

3. 

4. 

Q.

Which of the following is correct order of stability?

1. Gauche > Fully Eclipsed > Anti

2. Anti > Gauche > Fully Eclipsed

3. Fully Eclipsed > Gauche > Anti

4. Anti > Fully Eclipsed > Gauche

Q. In the following, the most stable conformation of n-butane is:

1. 
2. 
3. 
4. 

Q. Which of the following conformers for ethylene glycol is most stable?

1. 
2. 
3. 
4. 

Q.

In the above compound, $C_2$ is rotated clockwise ${120}^{\circ }$ about $C_2-C_3$ bond. The resulting conformer is:

1. Partially eclipsed

2. Eclipsed

3. Gauche

4. Staggered

Q. is the most stable conformation of butane.

1. Gauche form
2. Anti form
3. Eclipsed form
4. Fully eclipsed form

Q. Sort the following butane conformations according to stability.

1. Anti form
2. Fully eclipsed
3. Partial eclipsed
4. Gauche form

Q. Choose the incorrect statement(s) among the following:

1. There are only six conformers for n-butane
2. The keto form of acetylacetone in n-hexane is stable than the enol form
3. The gauche form of ethylene glycol is more stable
4. 8 isomers are possible for $C_4{H}_6$