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Physical Chemistry -- Chemical Bonding
1.
An ionic bond can be formed between two atoms when
- A.one of them has a low ionization energy and the other a high electron affinity
- B.both the atoms have low values of ionization energy
- C.both the atoms have high values of ionization energy
- D.both the atoms have low values of electron affinity
- Answer
- Report
Answer : [A]
2.
Which of the following is required for the formation of an ionic bond?
- A.An electron from the more electronegative element should be transferred to the less electronegative element.
- B.The total energy of the resulting molecule should be less than the total energy of the reactants.
- C.The lattice energy of the resultant molecule should be as low as possible.
- D.The ionic potentials of the reactants should be identical.
- Answer
- Report
Answer : [B]
3.
The cohesive energy of an ionic crystal is the energy
- A.liberated during its formation from individual neutral atoms
- B.absorbed during its formation from individual neutral atoms
- C.liberated during the formation of positive ions
- D.absorbed during the formation of negative ions
- Answer
- Report
Answer : [A]
4.
Which of the following statements is incorrect?
- A.NH3 is more basic than PH3.
- B.NH3 has a higher boiling point than that of HF.
- C.N2 is more inert than P4.
- D.The dipole moment of NH3 is less than that of SO2.
- Answer
- Report
Answer : [B]
5.
An ionic solid is a poor conductor of electricity because
- A.ions do not conduct electricity
- B.the charge on the ions is uniformly distributed
- C.ions occupy fixed positions in solids
- D.ions have uniform fields of influence
- Answer
- Report
Answer : [C]
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