The correct statement with regard to H2+ and H2-&n

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 Multiple Choice QuestionsMultiple Choice Questions

441.

Which of the following elements can be involved in  -  bonding?

  • Carbon

  • Nitrogen

  • Phosphorus

  • Boron


442.

Which one ofthe following statements about C2 molecule is wrong?

  • The bond order of C2 is 2.

  • In vapour phase, C2 molecule is diamagnetic.

  • Double bond in C2 molecule consists of both π- bonds because of the presence of 4es- in two π- molecular orbitals.

  • double bond in C2 molecule consists of one σ- bond and on π-bond.


443.

The type of hybridisation in SF6, molecule is

  • sp3d

  • dsp3

  • sp3d

  • d2sp3


444.

Among LiCl, BeCl2, BCl3 and CCl4 the covalent bond character follows the order

  • LiCl < BeCl2 < BCl3 < CCl4

  • BCl3 < CCl4 < BeCl2 < LiCl

  • BeCl2 < LiCl < CCl4 < BCl3

  • CCl4 < BCl3 < BeCl2 < LiCl


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445.

Which of the following has sp2-hybridisation?

  • C2H6

  • C2H4

  • BeCl2

  • C2H2


446.

An sp3-hybrid orbital contains

  • 14 s- character

  • 12 s- character

  • 23 s-character

  • 34 s-character


447.

Hybridisation states of C in CH3+ and CH3- are

  • sp2, sp3

  • sp3, sp2

  • sp, sp2

  • sp2, sp


448.

Which one of the following complexes is outer orbital complex?

  • [Co(NH3)6]3+

  • [Mn(CN)6]4+

  • [Fe(CN)6]4-

  • [Ni(NH3)6]2+


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449.

The correct statement with regard to H2+ and H2- is

  • both H2+ and H2- are equally stable

  • both H2+ and H2- do not exist

  • H2- is more stable than H2+

  • H2+ is more stable than H2-


D.

H2+ is more stable than H2-

The correct statement with regard to H2+ and H2- is, former is more stable than later.

H2+ : σ1s1 , σ1s°Bond order = 12H2- : σ1s2 , σ1s1 Bond order = 2 - 12 = 12

The bond order of H2+ and H2- are same. It is due to the presence of one electron in the antibonding molecular orbital in H2-.


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450.

The number of electrons, neutrons and protons in a species are equal to 10, 8 and 8 respectively. The proper symbol of the species is

  • O816

  • O818

  • Ne1018

  • O2-816


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