1. : Which of the following is the heteronuclear diatomic molecule that is paramagnetic in nature?
(A) HF and NO
(B) Only NO
(C) NO and O2
(D) HF and O2
2. : The molecules that have bond order equal to 1 are__________
(A) NO, HF, HCl, Li2, CO
(B) Li2, B2, CO, NO, He2+
(C) H2, Li2, B2, HF, HCl
(D) B2, CO, He2+, NO, HF
3. : What is the shape of the PCl5 molecule?
(A) Trigonal bipyramidal
(B) Linear
(C) Trigonal Planar
(D) Tetrahedral
4. : An example of sp3d2 hybridised molecule is ___________
(A) SF6
(B) ClO4–
(C) HCHO
(D) PF5
5. : What are the molecules having sp3d hybridization, because of unsymmetrical structure?
(A) Less stable and more reactive
(B) Less stable and more reasonable
(C) More stable and less reactive
(D) Less stable and less reactive
6. : What are the numbers of chlorine atoms that form the equatorial bonds in the PCl5 molecule?
(A) 1
(B) 3
(C) 2
(D) 4
7. : Which of the following is the bond angles in sp3d2 hybridisation?
(A) 109.5°
(B) 120°
(C) 90°
(D) 180°
8. : What is the interaction between a pair of orbitals of the same type?
(A) Attractive
(B) None of the mentioned
(C) There is no interaction
(D) Repulsive
9. : What does the combination of H (1s1) and F (2px1) give?
(A) Bonding orbital
(B) Both bonding and antibonding orbital
(C) Antibonding orbital
(D) None of the mentioned
10. : Which of the following is the bond order of the NO+ molecule?
(A) 3
(B) 2
(C) 2.5
(D) 4
11. : The molecule that is least stable is ____________
(A) NO+
(B) NO
(C) N2
(D) O2
12. : What is the percentage p-character in sp3 hybridisation?
(A) 25%
(B) 75%
(C) 50%
(D) 66.67%
13. : What is the shape of the H2O compound based upon concepts of hybridization?
(A) Tetrahedral
(B) Pyramidal
(C) Trigonal Planar
(D) Angular or bent structure
14. : Which of the following is the hybridisation of BeF3–?
(A) sp3
(B) sp
(C) d2sp3
(D) sp2
15. : What is the number of s and p bonds in cyclohexadiene (C6H8)?
(A) σ bond = 14, π bond = 2
(B) σ bond = 2, π bond = 14
(C) σ bond = 12, π bond = 2
(D) σ bond = 12, π bond = 4
16. : Which of the following is incorrect?
(A) The Valence bond theory explains the ionization or the gain of electrons that is giving the O2+ and O2– ions, if O2 has a stable octet
(B) The Molecular orbital theory always explains extra stability of the O2+ cation over the O2
(C) The Valence bond theory never explains the paramagnetic nature of O2
(D) The Resonance has no role in the Molecular orbital theory
17. : Which of the following is the hybridisation of Acetylene?
(A) sp3
(B) sp2
(C) sp
(D) dsp2
18. : The molecule that is not homonuclear is __________
(A) H2
(B) NO
(C) N2
(D) O2