Staggered Conformation

Q. Which of the following is the correct structure for staggered conformation of n-propane?

1. 
2. 
3. 
4. 

Q. In the given three conformational isomers which of the following has minimum torsional strain and minimum van der Waals strain.

1. 
2. 
3. All of the above.
4. 

Q. In the given conformation, $C_2$ is rotated about $C_2-C_3$ bond anticlockwise by an angle of ${120}^{\circ }$, then the conformation obtained is:

1. Fully eclipsed conformation
2. Partially eclipsed conformation
3. Gauche conformation
4. Staggered conformation

Q. Which of the following represents the staggered conformation with dihedral angle $\varphi ={60}^{\circ }$ ?

1. 
2. 
3. 
4. 

Q. The dihedral angle between the hydrogen atoms of two methyl groups in staggered conformation of ethane is :

1. ${120}^{\circ }$
2. ${180}^{\circ }$
3. ${60}^{\circ }$
4. ${90}^{\circ }$

Q. Which of the two conformation among the following represents staggered form of ethane?

1. 1 and 4
2. 2 and 3
3. 1 and 3
4. 1 and 2

Q. Which is the most stable conformer of ethane?

1. Skew conformer
2. All conformers are equally stable
3. Eclipsed conformer
4. Staggered conformer

Q. Choose the correct statement for the following newman projection of n-butane :

1. It is an eclipsed conformation
2. It is an anti (staggered) conformation.
3. It is a skew conformation.
4. None of the above

Q. What is the order of potential energies of the given conformers of 1, 2 - dichloroethane?

1. I < II < III < IV
2. IV < III < II < I
3. II < I < III < IV
4. II < I < IV < III

Q. Choose the increasing order of stability among the three main conformations (i.e. Eclipse, Anti, Gauche) of 2- Fluoro ethanol.

1. Eclipse < Gauche < Anti
2. Gauche < Eclipse < Anti
3. Eclipse < Anti < Gauche
4. Anti < Gauche < Eclipse