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Physical Chemistry -- Chemical Bonding
6.
According to Fajans’ rules, ionic bonds are formed when cations have
- A.low positive charge and large size
- B.low positive charge and small size
- C.high positive charge and large size, and anions have a small size
- D.a low positive charge and large size, and anions have a small size
- Answer
- Report
Answer : [D]
7.
A covalent bond is formed between two atoms when
- A.one or more pairs of electrons are shared by the two atoms
- B.the two atoms are of the same size
- C.the electronegativities of the two atoms differ considerably
- D.the electron affinities of the two atoms are the same
- Answer
- Report
Answer : [A]
8.
In an H2+ ion
- A.one electron is bound to two protons
- B.two electrons are bound to two protons
- C.three electrons are bound to two protons
- D.none of these happens
- Answer
- Report
Answer : [A]
9.
AlCl3 is covalent while AlF3 is ionic. This can be justified on the basis of
- A.the valence-bond theory
- B.Fajans’ rules
- C.the molecular-orbital theory
- D.hydration energy
- Answer
- Report
Answer : [B]
10.
Among of the following molecules, which is the most ionic?
- A.CaCl2
- B.SnCl2
- C.NaCl
- D.CuCl
- Answer
- Report
Answer : [C]
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