All of the following are correct statements regarding difference between sigma bond and pi-bond EXCEPT:
Correct answer: D. All are correct.
- A. Sigma bonds are stronger than pi bonds
- B. Pi bonds are weaker than sigma bonds
- C. in a carbon-carbon double bond, there is one sigma bond and one pi bond.
- D. All are correct.
Explanation
Option D is correct.Sigma bonds are stronger than pi bonds because the head-on overlap of orbitals results in a greater degree of overlap. This means that the electrons are more strongly attracted to both nuclei, which makes the bond stronger. Pi bonds are weaker than sigma bonds because the side-by-side overlap of orbitals results in less overlap. This means that the electrons are not as strongly attracted to both nuclei, which makes the bond weaker. A carbon-carbon double bond has one sigma bond and one pi bond. The sigma bond is formed by the head-on overlap of two sp2 hybridized orbitals on the carbon atoms. The pi bond is formed by the side-by-side overlap of two p orbitals on the carbon atoms. The sp2 hybridized orbitals are oriented at 120 degrees to each other, which gives the carbon-carbon double bond a trigonal planar shape. The p orbitals are perpendicular to the plane of the sp2 orbitals, which gives the pi bond a linear shape.
Last updated
About Chemical Bonding
Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
Practise Chemical Bonding
964 free Chemical Bonding MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
50% inversion of configuration and 50% retention of configuration observed is characteristics of mechanism:
A bonding electron pair is attracted by of atoms?
A Cl₂ molecule is formed by the overlap of:
A co-ordinate covalent bond is present in:
A covalent bond formed by the parallel overlap of p-orbitals is a weaker bond called: