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Assertion A sulphate ion is a biden tate...

Assertion A sulphate ion is a biden tate ligand and can also act as monodentate in cartain complexes
Reason Many a times multidentate ligands do have flexidentate character .

A

If both `(A)` and ` (R )` are correct and `(R )` is the correct explanation of `(A ) ` .

B

If both `(A)` and ` (R )` are correct and `(R )` is the correct explanation of `(A ) ` .

C

If`(A)` is correct, but `( R )` is incorrect .

D

Both `(A)` and `(R ) ` are incorrect .

Text Solution

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The correct Answer is:
To solve the question, we need to analyze both the assertion and the reason provided. ### Step 1: Understand the Assertion The assertion states that the sulfate ion (SO4^2-) is a bidentate ligand and can also act as a monodentate ligand in certain complexes. - **Bidentate Ligand**: A ligand that can form two bonds with a metal ion. In the case of sulfate, it has two oxygen atoms that can donate lone pairs to a metal center, allowing it to bind in two places. - **Monodentate Ligand**: A ligand that can form only one bond with a metal ion. In certain complexes, sulfate can bind through just one of its oxygen atoms. ### Step 2: Analyze the Reason The reason states that many multidentate ligands have a flexidentate character. - **Flexidentate Ligand**: This refers to ligands that have multiple donor atoms but can flexibly bind through one or more of those donor atoms. This means that a ligand can act as either a monodentate or a multidentate ligand depending on the coordination environment. ### Step 3: Evaluate the Assertion and Reason - The assertion is correct because sulfate can act as both a bidentate and a monodentate ligand. - The reason is also correct because it accurately describes the nature of multidentate ligands, including sulfate, which can exhibit flexidentate behavior. ### Conclusion Both the assertion and the reason are correct, and the reason provides a correct explanation for the assertion. ### Final Answer Both the assertion and reason are correct, and the reason is a correct explanation of the assertion. Therefore, the answer is option A. ---
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    A
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    B
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    C
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    D
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