Valence bond theory of metallic bond was given by from Chemistry

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 Multiple Choice QuestionsMultiple Choice Questions

321.

The helical structure of protein is stabilized by

  • dipeptide bond

  • hydrogen bonds

  • ether bonds

  • peptide bonds


322.

The dipole moment of HBr is 1.6 × 10-30 cm and inter-atomic spacing is 1 Å. The % ionic character of HBr is

  • 7

  • 10

  • 15

  • 27


323.

The C-O-H bond angle in ethanol is nearly

  • 90°

  • 104°

  • 120°

  • 180°


324.

The molecule having zero dipole moment is

  • CH2Cl2

  • BF3

  • NF3

  • ClF3


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325.

The bond angle is smallest in

  • H2O

  • H2S

  • BeCl2

  • N2O


326.

Which of the following shell, form an outer octahedral complex?

  • d4

  • d8

  • d6

  • None of these


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327.

Valence bond theory of metallic bond was given by

  • Dalton

  • Drudel

  • Fajan

  • Pauling 


D.

Pauling 

Valence bond theory (Resonance theory) of metallic bond was given by pualing (1937). According to this theory, the metallic bonding is essentially covalent in origin and metallic structure exhibits resonance of electro-pair bonds between each atom and its nearest neighbors. In other words, there is a resonance of a large number of canonical forms.


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328.

The calculated bond order in O2- ions is

  • 1

  • 1.5

  • 2

  • 2.5


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329.

Which combination of atoms can form a polar covalent bond ?

  • H and N

  • H and Br

  • N and N

  • Na and Br


330.

The bond length of H2+, H2- and H2 are in the following order

  • H2+ > H2 > H2-

  • H2H2+ > H2-

  • H2- > H2 > H2+

  • H2- > H2+ > H2


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