Cold ferrous sulphate solution on absorption of NO develops brown

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 Multiple Choice QuestionsMultiple Choice Questions

601.

dsp2 hybridisation is found in

  • [Ni(CN)4]2-

  • [CoCl4]2-

  • [CuCl4]3-

  • [CuCl4]2-


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602.

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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603.

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.


604.

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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605.

The electronic configuration is 1s2 2s2 2p5 3s1  shows

  • ground state of fluorine atom

  • excited state of fluorine atom

  • excited state of neon atom

  • excited state of ion O2


606.

Assertion : B2H6, Si2H6, are said to have similar structure.

Reason : They have same number of σ and π bonds.

  • If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

  • If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

  • If Assertion is true but Reason is false.

  • If Assertion is false but Reason is true.


607.

Assertion: Sigma (σ) is a strong bond, while pi (π) is a weak bond.
Reason: Atoms rotate freely about the pi (π) bond.

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

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

  • If the assertion is true but the reason is false.

  • If both the assertion and reason are false.


608.

The correct order of decreasing H-C-H angle in the following molecule is

  • I > II > III

  • II > I > III

  • III > II > I

  • I > III > II


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609.

The state of hybridization of the central atom and the number of lone pairs over the central atom in POCl3
are:

  • sp , 0

  • sp2 , 0

  • sp3 , 0

  • dsp2 , 1


610.

The compound that will have a permanent dipole moment among the following is

  • I

  • II

  • III

  • IV


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