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

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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-


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


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


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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.


D.

If Assertion is false but Reason is true.

B2H6 is an electron deficient compound. B2H6 contain some unusual bonds which are called as 2-electron 3-centre bonds.

                                 


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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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