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 18 of 49
- A. 1.7
- B. Zero
- C. 1
- D. 2
Explanation: The difference in the electronegative values of the bonded atoms is an index to the polar nature of the covalent bond.
Correct answer: Zero- A. ionic bond
- B. covalent bond
- C. metallic bond
- D. dative bond
Explanation: Correct Option: B This option is correct because covalent bonding is the type of chemical bonding formed by sharing a pair of electrons to…
Correct answer: covalent bond- A. Electron-proton
- B. Electron-electron
- C. Electron-nucleus
- D. Proton-nucleus
Explanation: The increase in size of an anion is due to the increase in the repulsion of electrons.
Correct answer: Electron-electron- A. Associative
- B. Multiplicative
- C. Additive
- D. All of these
Explanation: The ionic radii appear to be an additive property because an ion's size is primarily determined by the number of electrons in its…
Correct answer: Additive- A. Tetrahedral
- B. Trigonal
- C. Bent
- D. Linear
Explanation: The tetrahedral geometry exists when there are 4 bonds and 0 lone pairs.
Correct answer: Tetrahedral346. Nitrogen N2 molecule has 3 unpaired electron on each atom, therefore it shows three bonds that are:
- A. 2 sigma & 1 pi bond
- B. 1 sigma & 2 pi bond
- C. 3 sigma
- D. 3 pi bond
Explanation: Option B is correct since one sigma and two pi bonds are there as nitrogen has a triple bond between the two atoms.
Correct answer: 1 sigma & 2 pi bond- A. Gains 2e-
- B. Loses 1e-
- C. Loses 2e-
- D. Gains 1e-
Explanation: Option B Lose 1e- is correct since in the case of HF, the H-atom will lose 1e- as F tends to gain electrons.
Correct answer: Loses 1e-- A. Addition of Electrons
- B. Addition of Shells
- C. Increase in Nuclear Charge
- D. Strong Attractive Forces
Explanation: When you go down in groups in periodic table, the removal of electron become easy because as we go down the number of shells increases…
Correct answer: Addition of Shells- A. Positive sign
- B. Negative sign
- C. Neutral
- D. Delta sign
Explanation: When an electron is added to an atom, energy is released. This means that the electron affinity has a negative sign.
Correct answer: Negative sign- A. Linear
- B. Trigonal planar
- C. Tetrahedron
- D. Bent
Explanation: BH3 is an AB3 type molecule with no lone pair. So, it has trigonal planar geometry and each angle is of 120°.
Correct answer: Trigonal planar- A. One third
- B. One fourth
- C. Half
- D. Quarter
Explanation: The covalent radius is defined as:"Half of the single bond length between two similar atoms covalently bonded in a molecule".For instance…
Correct answer: Half- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Electronegativity trend is F>O>N. The greater the difference between the electronegativity of bonded atoms, the stronger the bond.
Correct answer: Option B353. Which of the following is the correct dot and cross diagram of bonding between two chlorine atoms?
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Two chlorine atoms will form a covalent bond between shared electrons. Covalent bonds occur between non-metals.
Correct answer: Option C- A. 120°
- B. 90°
- C. 109.5°
- D. 180°
Explanation: Option B is correct. In ethene (C2H4) ,each carbon atom is sp2 hybridized.
Correct answer: 90°- A. Polar covalent bond
- B. Non-polar covalent bond
- C. Pi (π) bond
- D. Co-ordinate covalent bond
Explanation: Fluorine is the most electronegative element with an electronegativity of 4.0 on the Pauling scale, while hydrogen has an…
Correct answer: Polar covalent bond- A. Hydrogen bonds
- B. Vander Waal's force
- C. Covalent bonds
- D. Dative bonds
Explanation: The 2 chains of nucleotides forming the DNA molecule are connected together and twisted around by hydrogen bonds between the 2 chains.
Correct answer: Hydrogen bonds- A. Ionization energy
- B. Ionic bond energy
- C. Electronegativity
- D. Electron affinity
Explanation: Electronegativity is the tendency of an atom of a given chemical element to attract shared electrons when forming a chemical bond.
Correct answer: Electronegativity- A. Bond pairs of electrons
- B. Lone pairs of electrons
- C. Unpaired electrons in atom or molecule
- D. Paired electrons in valence shells of electrons
Explanation: Paramagnetism is due to the presence of unpaired electrons in the material, so most atoms with incompletely filled atomic orbitals are…
Correct answer: Unpaired electrons in atom or molecule- A. Highly reactive gas
- B. Completely inert like noble gases
- C. Very less reactive gas
- D. Moderately reactive gas
Explanation: The strong triple bond in nitrogen molecule makes it extremely difficult to break hence it is inert.
Correct answer: Completely inert like noble gases- A. 0C
- B. 4C
- C. 2C
- D. -4C
Explanation: At 0oC, Ice is less dense than water. It is a fact.
Correct answer: 0C