Which one of the following have linear structure?(I) I3- (II

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 Multiple Choice QuestionsMultiple Choice Questions

341.

Aluminium chloride exists as dimer, Al2Cl6, in solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives

  • Al3+ + 3Cl-

  • [Al(H2O6]3+ + Cl-

  • [Al(HO)6]3- + 3HCl

  • Al2O3 + 6HCl


342.

Where of the O2-, O22-, BN and NN is/are paramagnetic ?

  • NN

  • O22-

  • BN

  • O2-


343.

Which of the following is not true?

  • In a first order reaction, the half-life is independent to the initial concentration of reactant.

  • A given piece of charcoal shows increase in its surface area in its powdered form.

  • In valence bond of H2, each electron spends its time around its own nucleus

  • In valence bond of H2, both the electrons spend their time around both the nucleus


344.

The correct order of decreasing dipole moment of (I) toluene, (II) m-dichlorobenzene (III) o-dichlorobenzene and (IV) p-dichlorobenzene is

  • IV < II < I < III

  • IV < I < II < III

  • I < IV < II < III

  • IV < I < III < II


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345.

The polypeptides are obtained by assembling the peptide units by

  • ionic bond

  • covalent bond

  • intermolecular H-bonding

  • covalent and H-bonding


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346.

Which one of the following have linear structure?

(I) I3- 

(II) NO2- 

(III) I3+ 

(IV) SO2

(V) N3-

  • I, II and III

  • I and V

  • II, III and IV

  • All of these


B.

I and V

I3- ion is made up of l2 molecule with an I- bonded to it by means of a coordinate bond. There are two bond pairs and three lone pairs. In the outer shell of central atom. To minimise the repulsive forces the three lone pairs occupy the equatorial positions. The ion is therefore, linear in shape with a bond angle of exactly 180°.

Similarly, N3- ion is also linear in shape.


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347.

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

  • 25

  • 27


348.

The bond order of H2- ion is 12. If it has 2 bonding electron, how many antibonding electrons it will have?

  • 4

  • 3

  • 2

  • 1


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349.

Ni2+ ion (Z= 28) contains unpaired electrons

  • 1

  • 2

  • 3

  • 5


350.

A magnetic moment of 1.73 BM will be shown by which one among the following compounds

  • [Cu(NH3)4]2+

  • [Ni(CN)4]2-

  • TiCl4

  • [CoCl6]4-


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