Assertion : Molecular nitrogen is less reactive than molecular ox

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 Multiple Choice QuestionsMultiple Choice Questions

561.

Which of the following is paramagnetic ?

  • N2

  • C2

  • N2+

  • O22-


562.

Assertion : SeCl4 does not have a tetrahedral structure.

Reason : Se in SeCl4 has two lone pairs.

  • 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.


563.

Intermolecular hydrogen bonding is strongest in :

  • C2H5OH

  • HF

  • H2O

  • CH3COCH3


564.

Hybridization present in ClF3 is :

  • sp2

  • sp3

  • dsp2

  • sp3d


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565.

Number of electrons surrounding Kr in KrF2 is :

  • 10

  • 6

  • 4

  • 8


566.

H - I - O bond angle in H2O2 :

  • 90o

  • 180o

  • 109.5o

  • 94.8o


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567.

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.


B.

If both assertion and reason are true but reason is not the correct explanation of assertion.

Bond order of nitrogen is 3 and that of oxygen is 2. Higher the bond order, higher is the bond dissociation energy, i.e. higher stability or less reactivity. Thus N2 is less reactive than O2.

Higher the bond order, shorter is the bond length. Higher bond order of N2 shows its shorter bond length.


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568.

Electron deficient molecule is :

  • CCl4

  • PCl5

  • BF3

  • SF6


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569.

Number of unpaired electrons in O2 molecule is :

  • zero

  • one

  • two

  • four


570.

Bond order in benzene is :

  • 1

  • 2

  • 1.5

  • none of these


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