In O3 molecule, the formal charge on the central O-atom is

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 Multiple Choice QuestionsMultiple Choice Questions

511.

Which is correct regarding size of atom?

  • N < O

  • B < Ne

  • V > Ti

  • Na > K


512.

Which of the following is not sp2 hybridised?

  • Graphite

  • Graphene

  • Fullerene

  • Dry ice


513.

Choose the correctly paired gaseous cation and its magnetic (spin only) moment (in B.M.)

  • Ti2+,3.87 B.M.

  • Cr2+, 4.90 B.M.

  • Co3+,3.87 B.M.

  • Mn2+,4.90 B.M.


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514.

In Omolecule, the formal charge on the central O-atom is

  • 0

  • -1

  • -2

  • +1


D.

+1

Lewis gave the structure of O, molecule as

Using the relation,
Formal charge = [Total no. of valence electrons in the free atom] - [Total no. of non-bonding (lone pair) electrons]- 12 [Total no. of bonding (shared) electrons]
The formal charge on central O -atom i.e., no. 1

=6-2- -(6)=+1


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515.

Which of the following represents the correct bond order?

  • O2+<O2->O22-

  • O2->O22->O2+

  • O22->O2+>O2-

  • O2+>O2->O22-


516.

What is the oxidation number of Br in KBrO?

  • + 6

  • + 7

  • + 5

  • + 8


517.

Which ofthe following statements is incorrect?

  • Li+ has minimum degree of hydration.

  • The oxidation state of K in KO2 is + 1.

  • Na is used to make a Na/Pb alloy.

  • MgSO4 is readily soluble in water.


518.

Assertion: Co(IV) is known but Ni(IV) is not.             

Reason: Ni(IV) has d4 electronic configuration.

  • 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.


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519.

Assertion : Molecular nitrogen is less reactive than molecular oxygen.

Reason: The bond length of N2 is shorter than that of oxygen.

  • 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.


520.

Assertion : Ohas higher bond length than O3.

Reason: Ois paramagnetic.

  • 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.


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