Co-ordination Assertion and reason - MCQ - basic level

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.