Which of the following molecules has the maximum dipole moment?

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 Multiple Choice QuestionsMultiple Choice Questions

381.

During the change of O2 to O2-, the incoming electrons goes to the orbital;

  • π*2Px

  • π2Px

  • σ*2Px

  • π2Py


382.

Predict the correct order among the following.

  • long pair-lone pair> bond pair-bond pair> lone pair>bond pair

  • bond pair-bond pair> lone pair-bond pair > lone pair -lone pair

  • lone pair -bond pair > bond pair- bond pair> lone pair -lone pair

  • lone pair -bond pair > bond pair- bond pair> lone pair -lone pair

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383.

The pair of an electron in the given carbanion,CH subscript 3 straight C identical to straight C to the power of minus is present in which orbital? 

  • sp3

  • sp2

  • sp

  • sp

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384.

Consider the molecules CH4, NH3 and H2O. Which of the given statement is false?

  • The H-O-H bond angle in H2O  is larger than the H-C-H bond angle in CH4.

  • The H-O-H bond angle in H2O is smaller than the H-N-H bond angle in NH3.

  • The H-C-H bond angle in CH4 is larger than the H-N-H bond angle in NH3

  • The H-C-H bond angle in CH4 is larger than the H-N-H bond angle in NH3

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385.

Which of the following species contains an equal number of σ and Π bond? 

  • HCO3-

  • XeO4

  • (CN)2

  • (CN)2

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386.

Consider the following compounds


Hyperconjugation occurs in 

  • I only

  • II only

  • III only

  • III only

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387.

The enolic form of ethyl acetoacetate as below has

  • 18 sigma bonds and 2 pi-bond

  • 16 sigma bonds and 1 pi-bond

  • 9 sigma bonds and 2 pi-bond

  • 9 sigma bonds and 2 pi-bond

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388.

The total number of Pi bond electrons in the following structure is

  • 4

  • 8

  • 12

  • 12

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389.

The pair of compounds that can exist together is 

  • FeCl3.SnCl2

  • HgCl2,SnCl2

  • FeCl2,SnCl2

  • FeCl2,SnCl2

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390.

Which of the following molecules has the maximum dipole moment?

  • CO2

  • CH4

  • NH3

  • NH3


C.

NH3

CO2 and CH4 have zero dipole moment as these are symmetrical in nature. Between NH3 and NF3 , NF3 has greater dipole moment though in NH3 and NF3 both, N possesses one lone pair of electrons.
This is because, in the case of NH3, the net N-H bond dipole is in the same direction as the direction of the dipole of the lone pair but in the case of NF3, the direction of the net bond dipole of three -N-F bonds is opposite the that of the dipole of the lone pair.

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