The electron configuration of the oxide ion is much most similar

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 Multiple Choice QuestionsMultiple Choice Questions

331.

The correct order of bond length is

  • b > a > c > d

  • a > b > c > d

  • d > c > b > a

  • c > d > b > a


332.

Consider the following ions:

(i) Ni2+   (ii) Co2+  (iii) Cr2+   (iv) Fe3+

(Given, at. no. Cr = 24, Fe = 26, Co = 27, Ni = 28)

The correct order of magnetic moment of these ions is

  • (i) < (ii) < (iii) < (iv)

  • (iv) < (ii) < (iii) < (i)

  • (i) < (iii) < (ii) < (iv)

  • (iii) < (iv) < (ii) < (i)


333.

Geometry of methyl free radical is

  • pyramidal

  • planar

  • tetrahedral

  • linear


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334.

The electron configuration of the oxide ion is much most similar to the electron configuration of the

  • sulphide ion

  • nitride ion

  • oxygen atom

  • nitrogen atom


B.

nitride ion

Species having the same number of electrons as in oxide ion, has the same electronic configuration as oxide ion.
In oxide ion (O2-), number of electrons
          = 8+2 =10
In sulphide ion (S2-), number of electrons
        = 16+2 =18
In nitride ion (N3-), number of electrons
       = 7+3 =10

In oxygen atom and nitrogen atom, number of electrons = 8, 7 respectively.
Hence, electronic configuration of

O2- or N3- (10) = σ1s2,  σ*1s2,  σ2s2,  σ*2s2,π2px1 ,π2py1


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335.

Which substance has the greatest ionic character?

  • Cl2O

  • NCl3

  • PbCl2

  • BaCl2


336.

Favourable conditions for the formation of electrovalent bond is that the cation and anion must have, respectively

  • high ionisation potential and low electron affinity

  • low ionisation potential and high electron affinity

  • high ionisation potential and high electron affinity

  • low ionisation potential and low electron affinity


337.

Consider the formal charges on N and B in H3N-BF3 and indicate which of the following is true?

  • N is +ve and B is -ve

  • N is --ve and B is +ve

  • both N and B carry similar +ve or -ve charges

  • charge discrimination is difficult to make


338.

Consider (i) CO2 (ii) CCl(iii) C6Cl6 and (iv) CO and tell which of the following statements is correct?

  • (i), (ii) and (iii) only have zero dipole moment

  • (i), (ii) and (iv) only have zero dipole moment

  • only (iv) has zero dipole moment

  • All have zero dipole moment


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339.

Intermolecular hydrogen bonding is strongest in

  • HCHO

  • CH3OH

  • C6H5OH

  • CH3NH2


340.

Which one of the following represents the correct state of hybridisation of P in PCl5 ?

  • s0p3

  • sp3d

  • s2p3

  • sp2d2


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