Which of the following represents the correct bond order?

• $O_2^{+}<O_2^{-}>O_2^{2-}$

• $O_2^{-}>O_2^{2-}>O_2^{+}$

• $O_2^{2-}>O_2^{+}>O_2^{-}$

• $O_2^{+}>O_2^{-}>O_2^{2-}$

What is the oxidation number of Br in KBrO₄ ?

• + 6

• + 7

• + 5

• + 8

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.

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.

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.

Assertion : O₂ has higher bond length than O₃.

Reason: O₃ is 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.

Assertion : NF₃ is a weaker ligand than N(CH₃)₃.

Reason : NF₃ ionizes to give F^- ions in aqueous solution.

• 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.

Assertion: All the hydrogen atoms in CH₄=C=CH₂ lie in one plane.

Reason : All the carbon atoms in its are sp² hybridized.

• 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.

789.

The structure of IF₅ can be best described as :

• 

• 

• 

• None of these

The percentage of p-character in the orbitals forming P-P bond in P₄ is :

• 25

• 33

• 50

• 75