The correct sequence of increasing covalent character is represen

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 Multiple Choice QuestionsMultiple Choice Questions

461.

The hybridisation state of carbon in fullerene is

  • sp

  • sp2

  • sp3

  • sp3d


462.

A fruity smell is produced by the reaction of C2H5OH with

  • CH3COCH3

  • CH3COOH

  • PCl5

  • CH3CHO


463.

When dihydroxy acetone reacts with HIO4, the product is/ are

  • HCHO

  • HCOOH

  • HCHO and HCOOH

  • HCHO and CO2


464.

Which of the following molecules has trigonal planar geometry?

  • IF3

  • PCl3

  • NH3

  • BF3


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465.

The correct sequence of increasing covalent character is represented by

  • LiCl < NaCl < BeCl2

  • BeCl2 < NaCl < LiCl

  • NaCl < LiCl < BeCl2

  • BeCl2 < LiCl < NaCl


C.

NaCl < LiCl < BeCl2

According to Fajan's rule, lower the size of cation higher will be its polarising power and higher will be covalent character.

 Polarising power  1size of action

Covalent character Polarising power

So, the correct order is NaCl < LiCl < BeCl2


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466.

Which of the following would have a permanent dipole moment?

  • BF3

  • SiF3

  • SF4

  • XeF4


467.

Which one of the following oxides is expected to exhibit paramagnetic behaviour?

  • CO2

  • SO2

  • ClO2

  • SiO2


468.

Which of the following is the correct increasing bond order for the given diatomic species?

  • NO<O2-<C22-<He2-

  • C22-<He22+<O2-<NO

  • He2+<O2-<NO<C22-

  • O2-<NO<C22-<He2+


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469.

The geometry of Ni(CO)4 and Ni(PPh3)2Cl2 are:

  • both square planar

  • tetrahedral and square planar respectively

  • both tetrahedral

  • square planar and tetrahedral respectively


470.

With which of the given pairs CO2 resembles ?

  • HgCl2, C2H2

  • HgCl2, SnCl4

  • C2H2, NO2

  • N2O, NO2


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