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Assertion and reason- MCQ - Basic level

Dear Readers,

Compared to other sections, Chemistry is considered to be the most scoring section. If prepared thoroughly, chemistry can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1. Assertion : Potassium ferrocyanide and potassium ferricyanite both are diamagnetic.
Reason : Both have unpaired electrons

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

If the assertion and reason both are false

Q2. 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 the reason is the correct explanation of the assertion.
  •  If both assertion and reason are true but reason is not the correct explanation of the assertion.
  •  If both assertion and reason are true but reason is not the correct explanation of the assertion.
  •  If the assertion and reason both are false
  •  If assertion is false but reason is true.

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

Q3. Assertion : The [Ni(en)3]Cl2 (en = ethylene diamine) has lower stability than [Ni(NH3)6]Cl2
Reason : In [Ni(en)3]Cl2 the geometry of Ni is trigonal bipyramidal

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

If the assertion and reason both are false

Q4. Assertion : The ligands nitro and nitrito are called ambidentate ligands.
Reason : These ligands give linkage isomers.

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

If both assertion and reason are true and the reason is the correct explanation of the assertion

Q5. Assertion : Geometrical isomerism is also called cis-trans isomerism.
Reason : Tetrahedral complexes show geometrical isomerism.

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

If assertion is true but reason is false.

Q6. Assertion : [Fe(CN)6]6- is weakly paramagnetic while [Fe(CN)6]4- is diamagnetic.
Reason : [Fe(CN)6]6- has +3 oxidation state while [Fe(CN)6]4- has +2 oxidation state.

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

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

Q7. Assertion : H2N-NH2 is a chelating ligand.
Reason : A chelating ligand must possess two or more lone pairs at such a distance that it may form suitable strain free rings at the metal ion.

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

If assertion is false but reason is true.

Q8. Assertion : [Ti(H2O)6]3+ is coloured while [Sc(H2O)6]3+ is colourless.
Reason : d-d transition is not possible in [Sc(H2O)6]3+ .

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

If both assertion and reason are true and the reason is the correct explanation of the assertion

Q9. Assertion : All the octahedral complexes of Ni2+ must be outer orbital complexes.
Reason : Outer orbital octahedral complexes are given by weak ligands.

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

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

Q10. Assertion : Potassium ferrocyanide is diamagnetic whereas potassium fericyanide is paramagnetic.
Reason : Crystal field splitting in ferrocyanide ion is greater than that of ferricyanide ion.

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

If assertion is true but reason is false.



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