Chemistry Coordination Compounds Class 12th Chemistry

Consider the following two statements.

Statement I: [Ni(H₂O)6]²⁺ is of green colour

Statement II: [Ni(CN)₄]^2– is colourless

Option 1 - <p><span lang="EN-IN">Statement I is true, statement II is false</span></p>

Option 2 - <p><span lang="EN-IN">Statement I is true, statement II is true</span></p>

Option 3 - <p><span lang="EN-IN">Statement I is false, statement II is true</span></p>

Option 4 - <p><span lang="EN-IN">Statement I is false, statement II is false</span></p>

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Alok Kumar Singh | Contributor-Level 10

4 months ago

Correct Option - 2

Detailed Solution:

[Ni (H₂O)₆]²⁺ Þ Ni²⁺ is octahedral and [Ni (CN)₄]^2– is square planar.

In [Ni (H₂O)₆]²⁺ Þ Ni²⁺ has two unpaired electrons and in [Ni (CN)₄]^2– Þ Ni²⁺ has no unpaired electrons. [Ni (H₂O)₆]²⁺ is coloured as it absorbs red light due to suitable d-d transition and complementary light emitted is green.

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