## 21. The species which has a square planar structure is

## 22. The hybrid orbitals used by bromine atom in BrF_{3} are

_{3}are

## 23. The symmetry elements that are present in BF_{3} are

_{3}are

## 24. The symmetry point group of the BF_{3} molecule is

_{3}molecule is

## 25. Icosahedral structure is generally exhibited by

## 26. On the basis of LCAO-MO theory, the magnetic characteristics of N_{2} and $${\text{N}}_2^ + $$ are

_{2}and $${\text{N}}_2^ + $$ are

## 27. The point group of CIF_{3} molecule and its corresponding number of irreducible representations are respectively

_{3}molecule and its corresponding number of irreducible representations are respectively

## 28. The crystal structure of Pb_{3}O_{4} contains

_{3}O

_{4}contains

## 29. The ground state term symbols for high spin d^{5}s^{1} and d^{5} configurations, respectively are

^{5}s

^{1}and d

^{5}configurations, respectively are

## 30. The bond angle of Cl_{2}O is

_{2}O is