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 15 of 49
- A. 1s orbital
- B. 2s orbital
- C. 2p orbital
- D. 2px orbital
Explanation: The formation of the hydrogen molecule can be explained using the Valence Bond Theory.
Correct answer: 1s orbital- A. AIO
- B. Al2O
- C. Al2O3
- D. Al302
Explanation: The formula for aluminum oxide is Al2O3. This formula indicates that there are two aluminum ions and three oxide ions present in the…
Correct answer: Al2O3- A. Electron affinity
- B. Ionization energy
- C. Electronegativity
- D. None of these options are correct
Explanation: The valency of an atom will be one if there is a sufficient gap between the first and second ionization energies.
Correct answer: Ionization energy- A. Large
- B. Very large
- C. Small
- D. Very small
Explanation: The decrease in atomic size when moving from left to right in transition elements is small due to intervening electrons.
Correct answer: Small- A. Electron affinity
- B. Ionization energy
- C. Electronegativity
- D. Potential energy
Explanation: OPTION A: Electron affinity is the energy change that occurs when an electron is added to a neutral atom to form a negative ion.OPTION B…
Correct answer: Ionization energy- A. High, Low
- B. Low, Low
- C. Low, High
- D. High, High
Explanation: In an ionic bond, the metal atom transfers electrons to the non-metal atom.
Correct answer: Low, High- A. Metals
- B. Non-metals
- C. Metalloids
- D. Transition elements
Explanation: Metals have low ionization energy and non-metals have high ionization energies.
Correct answer: Metalloids- A. One nucleus
- B. Both nuclei of atoms
- C. Lone pair
- D. Shared pair of electron
Explanation: Both nuclei of the atoms approach each other and forces of attraction and repulsion operate simultaneously, thus the bonding pair of…
Correct answer: Both nuclei of atoms- A. Positive sign
- B. Negative sign
- C. Neutral
- D. Delta sign
Explanation: Negative electron affinity means energy is released when an extra electron is added to the neutral atom.
Correct answer: Negative sign- A. Smaller
- B. Greater
- C. Higher
- D. Lower
Explanation: The negative ion is formed by gain of one or more electrons in neutral atom and the number of electron increase while the magnitude for…
Correct answer: Greater- A. 1s2, 2s2, 2px2, 2py2, 2pz2
- B. 1s2, 2s2, 2px2
- C. 1s2, 2s2, 2px2, 2py1
- D. 1s2, 2s2, 2px2, 2px2, 2pz1
Explanation: Neon has 10 electrons.The electrons are filled in the subs hello in order of increasing energy.Hence, the correct electronic configuration…
Correct answer: 1s2, 2s2, 2px2, 2py2, 2pz2- A. electronegative elements
- B. electropositive elements
- C. neutral elements
- D. charged elements.
Explanation: Electropositivity is a character of metals that tend to lose electrons to attain stability because at the initial stage (before losing…
Correct answer: electropositive elements- A. HF
- B. HCl
- C. H20
- D. H2
Explanation: H2 has 1 electron hence the two equally share the electron and have zero electronegativity difference hence are nonpolar.
Correct answer: H2- A. Decreases
- B. Increases
- C. Remains the same
- D. Fluctuates
Explanation: Across a period, the number of shells remains the same. The shielding effect is between the outer electron and the nucleus, hence, the…
Correct answer: Remains the same- A. Increased
- B. Released
- C. Decreased
- D. Absorbed
Explanation: The bonds of the atom are first broken to formindividual elements that then react with electrons.
Correct answer: Released- A. Electron affinity
- B. Ionization energy
- C. Electronegativity
- D. Polarity
Explanation: Electronegativity is the ability of an electron to attract electron binding pairs hence option C is the correct answer.
Correct answer: Electronegativity- A. Linear
- B. Trigonal planar
- C. Tetrahedron
- D. Bent
Explanation: If a molecule has 2 bond pairs and 0 lone pairs then the molecular shape will be linear. e.g.
Correct answer: Trigonal planar- A. Groups
- B. Periods
- C. Both A & B are correct
- D. None of these are correct
Explanation: As we move in a group from top to bottom, the number of shells and the effective nuclear charge increases but the effect of the addition…
Correct answer: Groups- A. Low
- B. High
- C. Intermediate
- D. Neutral
Explanation: Option: A Alkali Metals have low ionization energy because Size of the atom: The size of alkali metals is the largest in a particular…
Correct answer: Low300. The second ionization energy value of magnesium ion after the removal of the second electron is?
- A. 135 KJ/mol
- B. 145 KJ/mol
- C. 155 KJ/mol
- D. 773 KJ/mol
Explanation: Elements with a greater number of electrons have more than one value of ionization energy.
Correct answer: 773 KJ/mol