Assertion :A stable complex is formed when ethylene diamine (en) is added to $[N i (H_{2} O)_{4}]^{2 +}$ . Reason: (en) being a strong ligand replaces weak ligand $H_{2} O$ and thus, chelate is formed.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Option (A) is correct. $e n$ is a strong ligand and it splits d - orbitals in the complex ion to a greater extent than $H_{2} O$ and leads to the formation of a chelate complex.

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In the following questions a statement of assertion (A) followed by a statement of reason (R) is given. Choose the correct answer out of the following choices.
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(b) Assertion and reason both are true but reason is not the correct explanation of assertion.
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(d) Assertion is false, reason is true.

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Assertion :A stable complex is formed when ethylene diamine (en) is added to [Ni(H2O)4]2+. Reason: (en) being a strong ligand replaces weak ligand H2O and thus, chelate is formed.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for AssertionOption (A) is correct. en is a strong ligand and it splits d - orbitals in the complex ion to a greater extent than H2O and leads to the formation of a chelate complex.

Assertion :A stable complex is formed when ethylene diamine (en) is added to $[N i (H_{2} O)_{4}]^{2 +}$ . Reason: (en) being a strong ligand replaces weak ligand $H_{2} O$ and thus, chelate is formed.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Option (A) is correct. $e n$ is a strong ligand and it splits d - orbitals in the complex ion to a greater extent than $H_{2} O$ and leads to the formation of a chelate complex.