"Indicate no of sigma and pi bonds" is a phrase commonly used in chemistry to refer to the number of covalent bonds present in a molecule. Sigma and pi bonds are types of covalent bonds that differ in their electron sharing and hybridization.
A sigma bond is a type of covalent bond where two atoms share a pair of electrons in an overlapping orbital along the bond axis. It is the strongest type of covalent bond and is formed by the head-to-head overlap of atomic orbitals.
A pi bond is a type of covalent bond formed by the side-by-side overlap of p orbitals. It is weaker than a sigma bond and is usually formed in addition to a sigma bond to achieve maximum overlap between two atoms.
To determine the number of sigma and pi bonds in a molecule, you need to first draw its Lewis structure. Count the number of single bonds (sigma bonds) and double or triple bonds (one sigma bond and one or two pi bonds) in the structure to determine the total number of sigma and pi bonds.
The number of sigma and pi bonds in a molecule is important because it affects the molecule's physical and chemical properties. For example, molecules with more pi bonds are typically more reactive than those with fewer pi bonds. Knowing the number of bonds can also help in predicting the shape and polarity of a molecule.
