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MHT CET Chemistry question

ChemistryThe d and f-Block ElementsMHT CET

Some statements are given below about Lanthanides 1. Their tripositive ions are all coloured 2. With increases in atomic number, their atomic radii increases 3. Gadolinium exhibit oxidation state of +3 only 4. Last electrons in them enters into 5f orbitals Among the above

Answer: (C)

Solution

Statement 1 is false (La, Lu and Gd are colourless), 2 is false (radii decrease), 3 is true (Gd shows only

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Question ID VK-074571