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Physical Chemistry -- Chemical Bonding
16.
Among LiCl, BeCl2, BCl3 and CCl4, the covalent bond character varies as
- A.LiCl < BeCl2 > BCl3 > CCl4
- B.LiCl > BeCl2 < BCl3 < CCl4
- C.LiCl < BeCl2 < BCl3 < CCl4
- D.LiCl > BeCl2 > BCl3 > CCl4
- Answer
- Report
Answer : [C]
17.
Among LiCl, BeCl2, NaCl, CsCl, the compounds with the greatest and the
least ionic character respectively are
- A.LiCl and CsCl
- B.NaCl and LiCl
- C.CsCl and NaCl
- D.CsCl and BeCl2
- Answer
- Report
Answer : [D]
18.
The overlapping powers (overlap integrals) of 2s, 2p, 2sp2, 2sp3 and 2sp
orbitals are in the order
- A.2s > 2p > 2sp3 > 2sp2 > 2sp
- B.2p > 2s > 2sp3 > 2sp2 > 2sp
- C.2sp3 > 2sp2 > 2sp > 2s > 2p
- D.2sp3 > 2sp2 > 2sp > 2p > 2s
- Answer
- Report
Answer : [D]
19.
According to Fajans’ rules, covalent bond formation is favoured when there is a
- A.large cation and a small anion
- B.large cation and a large anion
- C.small cation and a small anion
- D.small cation and a large anion
- Answer
- Report
Answer : [D]
20.
Phosphorus shows a maximum covalency of
- A.five
- B.seven
- C.six
- D.three
- Answer
- Report
Answer : [C]
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