Assertion and Reason Questions on Class 12 Chemistry Chapter 9 COORDINATION COMPOUNDS

Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
(b) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
(c) If the Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.

Q.1. Assertion : NF3 is a weaker ligand than N(CH3)3.
Reason : NF3 ionizes to give F ions in aqueous solution.

Answer c

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

Answer b

Q.3. 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+.

Answer a

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