Chemical Bonding

Q. According to VSEPR theory, what is the shape of the molecule with the formula AX2E2?
  • A. Linear
  • B. Bent
  • C. Trigonal planar
  • D. Tetrahedral
Q. For which of the following diatomic molecules is the bond order equal to 2?
  • A. C2
  • B. N2
  • C. O2
  • D. F2
Q. For which of the following molecules is the bond order equal to 0?
  • A. He2
  • B. H2
  • C. Li2
  • D. Be2
Q. For which of the following molecules is the molecular orbital diagram similar to that of O2?
  • A. N2
  • B. F2
  • C. C2
  • D. Ne2
Q. For which of the following pairs of molecules is the bond order the same?
  • A. N2 and C2
  • B. O2 and F2
  • C. B2 and C2
  • D. N2 and O2
Q. Identify the hybridization of the central atom in NH3.
  • A. sp
  • B. sp2
  • C. sp3
  • D. dsp3
Q. Identify the hybridization of the nitrogen atom in NH3.
  • A. sp
  • B. sp2
  • C. sp3
  • D. dsp2
Q. In molecular orbital theory, which of the following orbitals is the highest energy in O2?
  • A. σ2p
  • B. π2p
  • C. σ2s
  • D. π2s
Q. In molecular orbital theory, which of the following statements is correct regarding the energy levels of orbitals?
  • A. σ orbitals are always lower than π orbitals.
  • B. π orbitals are always lower than σ orbitals.
  • C. σ* orbitals are always higher than π* orbitals.
  • D. Energy levels can vary based on the atoms involved.
Q. In the molecular orbital diagram of diatomic nitrogen (N2), which orbitals are filled first?
  • A. σ2s, σ*2s
  • B. σ2p, π2p
  • C. π2p, σ2p
  • D. σ*2p, π*2p
Q. In the molecular orbital theory, which of the following is true for the π molecular orbitals?
  • A. They are formed by end-to-end overlap.
  • B. They are lower in energy than σ orbitals.
  • C. They can accommodate a maximum of 2 electrons.
  • D. They are always bonding.
Q. In the molecular orbital theory, which of the following orbitals is lower in energy than the 2p orbitals?
  • A. 2s
  • B. 3s
  • C. 2p
  • D. 3p
Q. In the molecular orbital theory, which of the following orbitals is lower in energy for homonuclear diatomic molecules?
  • A. σ2p
  • B. π2p
  • C. σ2s
  • D. π2s
Q. In the molecular orbital theory, which of the following orbitals is the highest energy in O2?
  • A. σ2p
  • B. π2p
  • C. σ*2p
  • D. π*2p
Q. In the molecular orbital theory, which of the following orbitals is the highest occupied molecular orbital (HOMO) in O2?
  • A. σ2p
  • B. π2p
  • C. σ*2p
  • D. π*2p
Q. In the molecular orbital theory, which of the following pairs of orbitals can combine to form a sigma bond?
  • A. s and p
  • B. p and p
  • C. s and s
  • D. d and p
Q. In the molecular orbital theory, which orbitals combine to form sigma bonds?
  • A. s and p orbitals
  • B. p and d orbitals
  • C. s orbitals only
  • D. p orbitals only
Q. In which of the following compounds does the central atom exhibit dsp3 hybridization?
  • A. PCl5
  • B. SF6
  • C. XeF4
  • D. NH3
Q. In which of the following compounds does the central atom exhibit sp hybridization?
  • A. C2H4
  • B. N2
  • C. HCl
  • D. C2H2
Q. In which of the following compounds does the central atom have sp3d hybridization?
  • A. PCl5
  • B. SiCl4
  • C. XeF4
  • D. NH4Cl
Q. In which of the following compounds is the bond order equal to 1?
  • A. N2
  • B. O2
  • C. H2
  • D. Cl2
Q. In which of the following molecules does the molecular orbital configuration lead to paramagnetism?
  • A. N2
  • B. O2
  • C. F2
  • D. Ne2
Q. In which of the following molecules does the molecular orbital configuration show unpaired electrons?
  • A. N2
  • B. O2
  • C. F2
  • D. Ne2
Q. In which of the following molecules does the molecular orbital diagram show a paramagnetic behavior?
  • A. N2
  • B. O2
  • C. F2
  • D. Ne2
Q. In which of the following molecules does the molecular orbital theory predict a paramagnetic behavior?
  • A. N2
  • B. O2
  • C. C2
  • D. Ne2
Q. In which of the following molecules does the molecular orbital theory predict a triple bond?
  • A. N2
  • B. O2
  • C. C2
  • D. H2
Q. In which of the following species does the molecular orbital configuration show a paramagnetic behavior?
  • A. N2
  • B. O2
  • C. F2
  • D. Ne2
Q. What is the bond angle in a methane (CH4) molecule?
  • A. 90 degrees
  • B. 109.5 degrees
  • C. 120 degrees
  • D. 180 degrees
Q. What is the bond angle in a tetrahedral molecule?
  • A. 90 degrees
  • B. 120 degrees
  • C. 109.5 degrees
  • D. 180 degrees
Q. What is the bond angle in a trigonal planar molecule?
  • A. 120 degrees
  • B. 109.5 degrees
  • C. 180 degrees
  • D. 90 degrees
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