NEET2023ChemistryChapterActual
Which one of the following statements is true with respect to the bond order in compounds H 2 SiO and Cl 2 SiO ?
Options
- ACl 2 SiO H 2 SiO SiO bond order less than 2 SiO bond order equal to 2
- BCl 2 SiO H 2 SiO SiO bond order equal to 2 SiO bond order equal to 2
- CCl 2 SiO H 2 SiO SiO bond order more than 2 SiO bond order equal to 2
- DCl 2 SiO H 2 SiO SiO bond order equal to 2 SiO bond order more than 2
Correct answer
A. Cl 2 SiO H 2 SiO SiO bond order less than 2 SiO bond order equal to 2
Step-by-step solution
Si is sp 2 hybridized in both H 2 SiO and Cl 2 SiO , and both the molecules are triangular planar in shape. Also Si has vacant d -orbitals 3 d and chlorine has unshared pair of electrons in the valence shell, there are some chances of back bonding in Cl 2 SiO as: Due to the above shown back bonding, Si - O bond is expected to acquire some single bond character which leads to weakening of the bond. No such back bonding is possible in H 2 SiO since hydrogen has no unshared electron pair. Therefore Si - O bond in H 2