Eclipsed Conformation

Q. What is the dihedral angle in eclipsed conformation of ethane molecule?

1. $0^{\circ }$
2. ${60}^{\circ }$
3. ${120}^{\circ }$
4. ${90}^{\circ }$

Q. The dihedral angle between two methyl group in partially eclipsed conformation of n-butane is :

1. ${180}^{\circ }$
2. ${120}^{\circ }$
3. ${90}^{\circ }$
4. ${109}^{\circ }{28}^{\prime }$

Q. Which of the following represent the Sawhorse projection of butane molecule ?

1. 
2. 
3. 
4. 

Q. Dihedral angle of least stable conformer of ethane is:

1. $0^o$
2. ${60}^o$
3. ${120}^o$
4. ${180}^o$

Q. Why the structure of H2O ( water) is bent?, why not triangular

Q.

What is Torsional Strain?

Q. Torsional strain in eclipsed conformations of a molecule is due to:

1. Repulsions between aligned 'H'
2. Repulsion between aligned electron pairs of the eclipsed bond
3. Repulsion between the eclipsed carbons
4. None of the above

Q. The dihedral angle between two methyl group in partially eclipsed conformation of n-butane is :

1. ${180}^{\circ }$
2. ${120}^{\circ }$
3. ${90}^{\circ }$
4. ${109}^{\circ }{28}^{\prime }$

Q. Assertion- CO2 is resonance stabilized molecule. Reason- Bond length of C-O in CO2 is intermediate of single and double Bond length.

Q. Choose the fully eclipsed conformation of butane from among the following.

1. 
2. 
3. 
4. 

Q. Choose the correct statement for the following newman projection :

1. It is an eclipsed conformation.
2. It is a staggered conformation.
3. It is a skew conformation.
4. All of the above.

Q. Choose the eclipsed conformations from among the following.

1. 
2. 
3. 
4. 

Q. Torsional strain in eclipsed conformations of a molecule is due to:

1. Repulsion between the eclipsed carbons
2. Repulsion between aligned electron pairs of the eclipsed bond
3. Repulsions between aligned 'H'
4. None of the above

Q.

Energy barrier between staggered and eclipsed conformation of ethane is?

1. 2.9 K Cal/ mole

2. 12 K Cal/ mole

3. 16 K Cal/ mole

4. 0.6K Cal/ mole

Q. Choose the correct statement for the following newman projection :

1. It is an eclipsed conformation.
2. It is a staggered conformation.
3. It is a skew conformation.
4. All of the above.

Q. Torsional strain in eclipsed conformations of a molecule is due to:

1. repulsion between the eclipsed carbons
2. repulsion between aligned electron pairs of the eclipsed bond
3. repulsions between C-H bonds of eclipsed conformation
4. repulsions betwen aligned ‘H’

Q. The maximum number of equal bond angles in $XeO{F}_4$ is

1. 8
2. 2
3. 6
4. 10

Q. Choose the eclipsed conformations from among the following.

1. 
2. 
3. 
4. 

Q. In the structure of $S{F}_4$, the lone pair of electrons on $S$ is in

Q. If shape of anion is tetrahedral, then the shape of cation formed is :

1. Linear
2. Bent
3. Pentagonal bipyramidal
4. Trigonal planar

Q. Choose the correct statement for the following newman projection.

1. It is an eclipsed conformation
2. It is a staggered conformation
3. It is a skew conformation
4. All of the above

Q. Which of the following compound/ion is/are having pyramidal geometry?

1. $(Si{H}_3{)}_{3}N$
2. ${C{H}_3}^{+}$
3. $(C{H}_3{)}_{3}N$
4. ${Cl{O}_3}^{-}$

Q. Choose the fully eclipsed conformation of butane from among the following.

1. 
2. 
3. 
4. 

Q. Assertion :Structure of $S{O}_4^{2-}$ is identical to $S_2{O}_3^{2-}$. Reason: Sulphur atoms in $S_2{O}_3^{2-}$ are in different oxidation states.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Both Assertion and Reason are incorrect.