Cold ferrous sulphate solution on absorption of NO develops brown

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 Multiple Choice QuestionsMultiple Choice Questions

861.

Assertion : NF3 is a weaker ligand than N(CH3).

Reason : NF3 ionizes to give F- ions in aqueous solution.

  • If both assertion and reason are true and the reason is the correct explanation of the assertion.

  • If both assertion and reason are true and the reason is not the correct explanation of the assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


862.

Hybridisation in CH3, C+H3  and C-H3 are respectively

  • sp2, sp2, sp3

  • sp2, sp3, sp3

  • sp3, sp3, sp2

  • sp3, sp2, sp3


863.

Assertion : The O - O bond length in H2O2 is shorter than that of O2F2.

Reason : H2O2 is an ionic compound.

  • If both assertion and reason are true and the reason is the correct explanation of the assertion.

  • If both assertion and reason are true and the reason is not the correct explanation of the assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


864.

In which of the following - bonding is possible?

  • CO32-

  • PO43-

  • NO3-

  • NO2-


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865.

Smallest intermolecular distance is found in

  • O2

  • O2+

  • O2-

  • O22-


866.

The number of lone pairs of electrons on the central atoms of H2O, SnCl2, PCl3 an XeF2 respectively are

  • 2, 1, 1, 3

  • 2, 2, 1, 3

  • 3, 1, 1, 2

  • 2, 1, 2, 3


867.

dsp2 hybridisation is found in

  • [Ni(CN)4]2-

  • [CoCl4]2-

  • [CuCl4]3-

  • [CuCl4]2-


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868.

Cold ferrous sulphate solution on absorption of NO develops brown colour due to the formation of

  • paramagnetic [Fe(H2O)5(NO)] SO4

  • diamagnetic [Fe(H2O)5(N3)] SO4

  • paramagnetic [Fe(H2O)5(NO3)][SO4]2

  • diamagnetic [Fe(H2O)4 (SO4)]NO3


A.

paramagnetic [Fe(H2O)5(NO)] SO4

Cold ferrous sulphate or FeSO4 solution on absorption of NO develops brown colour due to the formation of [Fe(H2O)5(NO)]SO4. It can be expressed as-

FeSO4 + NO + 5H2O → [Fe(H2O)5(NO)]SO4

[Fe(H2O)5(NO)]SO4 is a brown ring complex. It has 3.89 BM magnetic moment and has 3 unpaired electrons.


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869.

Which of the following option w.r.t. increasing bond order is correct ?

  • NO < C<O2<He2+

  • C< NO < He2< O2-

  • He2< O2< NO  < C2

  • He2< O2< C< NO.


870.

The BCl3, is a planar molecule where as NCl3, is pyramidal. because

  • B-Cl bond is more polar than N-Cl bond

  • N-Cl bond is more covalent than B-Cl bond

  • nitrogen atom is smaller than boron atoms

  • BCl has no lone pair but NCl3 has a lone pair of electrons.


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