Free Chemical Bonding MCQs with Answers
964 Chemical Bonding MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
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Read the Chemical Bonding notesFree MDCAT chapter notes with key terms964 questions · page 35 of 49
- A. H2
- B. Cl2
- C. N2
- D. All of these
Explanation: Among the molecules H2 (hydrogen gas), Cl2 (chlorine gas), and N2 (nitrogen gas), all of them contain non polar covalent bonds.In a non…
Correct answer: All of these- A. Ionic bond
- B. Coordinate covalent bond
- C. Covalent bond
- D. Delocalized covalent bond
Explanation: There are no delocalized covalent bonds in NH4OH. In NH4OH, the bonding involves the formation of ions.
Correct answer: Delocalized covalent bond- A. Sigma (σ) bond
- B. lonic bond
- C. Pi (π) bond
- D. Metallic bond
Explanation: The head-on overlap of p-orbitals of two atoms gives rise to a sigma (σ) bond.
Correct answer: Sigma (σ) bond- A. Li
- B. Ca
- C. Mg
- D. Na
Explanation: Among the elements lithium (Li), calcium (Ca), magnesium (Mg), and sodium (Na), sodium (Na) is the most reactive.
Correct answer: Na- A. NaCl
- B. HF
- C. HCl
- D. CsF
Explanation: Among the molecules NaCl, HF, HCl, and CsF, hcl is the least ionic. Ionic character in a molecule is determined by the electronegativity…
Correct answer: HCl- A. CH4
- B. NH3
- C. BF3
- D. PH3
Explanation: BF3 is coplanar because the boron atom is sp2 hybridized, which means that it has a trigonal planar geometry.
Correct answer: BF3- A. One σ and three π
- B. Three σ bonds only
- C. One σ and two π
- D. Two σ and one π
Explanation: In a nitrogen molecule (N2), there are one sigma (σ) bond and two pi (π) bonds.The sigma bond is formed by the head-on overlap of the two…
Correct answer: One σ and two π- A. A: Boron
- B. B: Nitrogen
- C. C: Carbon
- D. D: Oxygen
Explanation: Nitrogen having a half-filled 2p orbital will have no electron pairs in the valence shell, so there will be no repulsion.
Correct answer: B: Nitrogen- A. HCl
- B. H2O
- C. NH3
- D. HF
Explanation: HF consists of a hydrogen atom bonded to a fluorine atom. It is also a polar covalent molecule.
Correct answer: HF- A. PH3, NH3
- B. BF3, PCl3
- C. H2S, CO2
- D. SO2, CO2
Explanation: NH3 (Ammonia) has a pyramidal shape, with the nitrogen atom in the center and three hydrogen atoms surrounding it.
Correct answer: PH3, NH3691. In which of the following molecules would you expect the nitrogen-nitrogen bond to be the shortest?
- A. N2H4
- B. NH3
- C. N2
- D. N2O
Explanation: The nitrogen-nitrogen (N-N) bond in N2 (nitrogen gas) would be the shortest among the given molecules.
Correct answer: N2692. Which of the following best describes the shape and polarity of the carbon disulphide molecule?
- A. A. Bent and polar
- B. B. Pyramidal and polar
- C. C. Linear and non-polar
- D. D. Bent and non-polar
Explanation: The carbon disulfide (CS2) molecule has a linear shape and is nonpolar.Shape (Molecular Geometry): Carbon disulfide (CS2) consists of a…
Correct answer: C. Linear and non-polar- A. Higher than individual atom
- B. Equal to individual atom
- C. Lower than individual atom
- D. Impossible to predict
Explanation: When atoms combine to form a compound, they often release energy in the form of chemical bonds.
Correct answer: Lower than individual atom- A. Equal to 1.7
- B. Greater than 1.7
- C. Between 0.5 to 1.7
- D. Zero
Explanation: A covalent bond is formed when two atoms share electrons to achieve a more stable electron configuration.
Correct answer: Zero- A. PH3
- B. NH3
- C. CH3+
- D. None of these
Explanation: The central atom in a molecule or ion uses hybrid orbitals to form bonds based on its electron configuration and the geometry of the…
Correct answer: CH3+- A. Linear
- B. Trigonal planar
- C. Tetrahedral
- D. Trigonal pyramidal
Explanation: According to the VSEPR (Valence Shell Electron Pair Repulsion) theory, a molecule with three bond pairs and no lone pair of electrons will…
Correct answer: Trigonal planar- A. Unhybridized p-orbitals
- B. Hybridized and unhybridized orbitals
- C. Hybrid orbitals
- D. S-orbitals
Explanation: Pi bonds are formed by the overlapping of unhybridized p orbitals in a side-to-side or parallel manner.
Correct answer: Unhybridized p-orbitals- A. CH4
- B. NH3
- C. HF
- D. H2O
Explanation: CH4 (methane) is a tetrahedral molecule with four identical C-H bonds. The C-H bonds are polar, but the individual dipole moments cancel…
Correct answer: CH4- A. H2
- B. F2
- C. HF
- D. N2
Explanation: Only F2 has an overlap of p and p orbitals only. This is because the fluorine atom has two unpaired electrons in its 2p orbitals.
Correct answer: F2- A. 154 pm
- B. 120 pm
- C. 133 pm
- D. 105 pm
Explanation: The carbon-carbon double bond length in C3H6 is 133 pm. This is shorter than the carbon-carbon single bond length in ethane (C2H6), which…
Correct answer: 133 pm