BIOCHEMISTRY

1. What is the primary difference between a sigma bond and a pi bond?

• A sigma bond is stronger than a pi bond.

• A sigma bond results from the overlap of orbitals along the internuclear axis, while a pi bond results from the sideways overlap.

• A sigma bond forms between two p orbitals, while a pi bond forms between an s orbital and a p orbital.

• A sigma bond involves the sharing of electron density above and below the internuclear axis, while a pi bond involves the sharing of electron density along the internuclear axis.

2. It is a type of covalent bond which is formed by head to head overlapping of the atomic orbital along the inter-nuclear axis.

• Sigma Bond.

• Sigma and Pi bond in Double Bond.

• Pi Bond.

• Sigma and Pi bond in Single Bond.

3. It is a bond that contains one sigma bond and one pi bond.

• Sigma and Pi bond in Single Bond.

• Sigma and Pi bond in Triple Bond.

• Sigma and Pi bond in Double Bond.

• All of the above.

4. Calculate the number of sigma and pi bonds in water (H2O).

• 2 sigma bonds and 0 pi bond.

• 0 sigma bonds and 0 pi bond.

• 2 sigma bonds and 2 pi bond.

• No bonds.

5. The total number of sigma and pi bond in C2H4 is?

• Three sigma bonds and three-pi bonds.

• Five sigma bonds and one pi-bond.

• Five sigma bonds and three-pi bonds.

• Three sigma bonds and five-pi bonds.

6. Calculate the number of pi bonds in ethyne (C2H2).

• 3 π

• 2 π

• 4 π

• 0

7. All bonds between atom is most organic compounds that contains________?

• Two sigma bonds.

• Two sigma bonds and one pi-bond.

• One sigma bond and one pi-bond.

• One sigma bond.

8. They are strong and exhibit high electron density between the nuclei of bonded atoms, making them efficient in holding the atoms together.

• Strength sigma bonded.

• Strength sigma bonds.

• Strength sigma bond.

• None of the above.

9. Consist of two electrons shared between two hydrogen atoms.

• H2H

• H2

• O2

• None of the above.

10. Pi bonds involve the electrons in the leftover ______ for each carbon atom.

• S orbital.

• P orbital.

• D orbital.

• None of the above.