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Chapter No 6 :Chemical Bonding | Orbital Concept (85 MCQ`S)

This chapter include mcqs on Chemical Bonding with answers & relevant explanation for the preparation of NEET exams, PSC exams, Chemical Bonding Practice Test with answers & relevant explanation, Chemical Bonding Important Questions With Answers for the Preparation of public service commission exam, MCQ on Chemical Bonding with Answers PDF, Chemical Bonding kips MCQs, Chemical Bonding MCQs MDCAT, MCQs on Orbital Concept with Answers & relevant explanation for NEET exam

  1. When a chemical bond is formed between the two atoms, the P.E of the system:
    1. increases
    2. decreases
    3. remains the same
    4. cannot be predicted
      5. Show Answer
      Answer: B
      Explanation:
      • Energy of the sysytem is lowered during bond formation.
  2. According to valence bond theory, a covalent bond between the two atoms is formed when:
    1. non-bonding atomic orbitals overlap
    2. atomic orbitals intermix
    3. half filled atomic orbitals overlap
    4. completely filled atomic orbitals overlap
      5. Show Answer
      Answer: C
      Explanation:
      • N/A
  3. The essential condition for the formation of a covalent bond is/are:
    1. combining atomic orbitals must be half filled
    2. partially filled atomic orbitals must overlap
    3. the combining orbitals must have proper alignment
    4. all of these
      5. Show Answer
      Answer: D
      Explanation:
      • N/A
  4. Greater the overlapping between the atomic orbitals:
    1. stronger is the bond formed
    2. weaker is the bond formed
    3. greater is the P.E of the system
    4. greater is the bond length
      5. Show Answer
      Answer: A
      Explanation:
      • N/A
  5. Which one has greater bond energy?
    1. C - H
    2. C - C
    3. C - N
    4. C - O
      5. Show Answer
      Answer: A
      Explanation:
      • H-atom is small sized and causes greater overlapping which results in the formation of a strong covalent bond.
  6. Which one has greater bond energy?
    1. C - C
    2. C = C
    3. C ≡ C
    4. C ≡ N
      5. Show Answer
      Answer: D
      Explanation:
      • Multiple bonds have greater bond energy. Bond between C & N atoms is polar.
  7. A stronger covalent bond has:
    1. larger bond length
    2. shorter bond length
    3. lower bond energy
    4. none of these
      5. Show Answer
      Answer: B
      Explanation:
      • N/A
  8. During the formation of a H2 molecule:
    1. electrons in the atomic orbital become paired
    2. the system is stabilized
    3. the energy of the system is negative
    4. all of these
      5. Show Answer
      Answer: D
      Explanation:
      • Energy of the sysytem is lowered during bond formation and the system becomes stable.
  9. By decreasing the internuclear distance between the H-atoms beyond a certain equilibrium distance, the P.E of the system:
    1. increases
    2. decreases
    3. remains the same
    4. becomes zero
      5. Show Answer
      Answer: A
      Explanation:
      • After bond formation, further decrease in internuclear distance increases the P.E of the system and it becomes unstable.
  10. At a large internuclear distance between the isolated H-Atoms, the P.E of the system is:
    1. maximum
    2. minimum
    3. is zero
    4. gradually increasing
      5. Show Answer
      Answer: C
      Explanation:
      • Due to the absence of attractive or repulsive forces between the atoms.

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