Assertion: The S-S-S bond angle in S8 molecule is 105°.Reason

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 Multiple Choice QuestionsMultiple Choice Questions

551.

The geometry of methane molecule is :

  • tetrahedral

  • pyramidal

  • octahedral

  • square planar


552.

Heisenberg's uncertainty principle can be explained as :

  •  p × h4π

  • x x  h4π

  • x x  hπ

  •  πhx


553.

The bond energy is the energy required to :

  • dissociate one mole of the substance

  • dissociate bond in 1 kg of the substance

  • break one mole of similar bonds

  • break bonds in one mole of the substance


554.

What is binding energy in B511 nucleus , if mass is 0.08181 amu ?

  • 1.2 x 10-4 erg/nucleus

  • 8.2 x 10-4 erg/nucleus

  • 10.2 x 10-4 erg/nucleus

  • 1.9 x 10-4 erg/nucleus


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555.

Hydrofluoric acid shows hydrogen bonding due to :

  • high electron affinity of fluorine

  • high bond dissociation energy of fluorine

  • high electronegativity of fluorine

  • none of the above


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556.

Assertion: The S-S-S bond angle in S8 molecule is 105°.

Reason : S8 has a V-shape.

  • 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 both assertion and reason are false


C.

If assertion is true but reason is false

Atoms in S8 molecule undergoes sp3 hybridisation and consists of two lone pairs of electrons on each and exists as staggered 8 atom rings.


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557.

Assertion : Sodium formate has both the C-O bonds have same value 1.27Å.

Reason : Equal bond length is due to the phenomenon of resonance.

  • 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 both assertion and reason are false


558.

Ionic compounds are formed most easily with :

  • low electron affinity , high ionisation energy

  • high electron affinity , low ionisation energy

  • low electron affinity , low ionisation energy

  • high electron affinity , high ionisation energy


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559.

The order of bond length is

  • O2 < O3 < O22-

  • O2 < O22- < O3

  • O22- < O3 < O2

  • O2 = O22- > O3


560.

The correct order of dipole moment is

  • CH4 <NF<NH<H2O

  • NF3 <CH4 <NH3 <H2O

  • NH3 <NF3 <CH4 <H2O

  • H2O <NH3 <NF<CH4


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