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Physical Chemistry -- Chemical Bonding
21.
Among the following, which have resonating structures?
- A.BF3
- B.PCl5
- C.SF6
- D.IF7
- Answer
- Report
Answer : [A]
22.
Which of the following molecules form 2-electron 3-centred bonds?
- A.Al2Cl6
- B.Hg2Cl2
- C.B2H6
- D.BH3
- Answer
- Report
Answer : [C]
23.
An atom of element A has 3 electrons in its outermost shell while one of
element X has 6 electrons in its outermost shell. The formula of the
compound formed by A and X is
- A.A2X4
- B.A2X3
- C.A3X2
- D.A2X
- Answer
- Report
Answer : [B]
24.
In a metallic crystal the
- A.valence electrons remain within the fields of influence of their own kernels
- B.valence electrons constitute a sea of mobile electrons
- C.valence electrons are localized between the two kernels
- D.kernels as well as the electrons move rapidly
- Answer
- Report
Answer : [B]
25.
Polarization involves the distortion of the shape of an anion by an
adjacently placed cation. In this context, which of the following
statements is correct?
- A.Maximum polarization is brought about by a cation of high charge.
- B.Minimum polarization is brought about by a cation of low radius.
- C.A large cation is likely to bring about a high degree of polarization.
- D.The polarizing power of a cation is less than that of an anion.
- Answer
- Report
Answer : [A]
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