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CBSE Notes 2011-2012 » XII-Chemistry-Term1

The d and f-Block Elements

Name the lanthanoid element which exhibits a + 4 oxidation state besides + 3 oxidation state. [Delhi...

Short answer question

Name the lanthanoid element which exhibits a + 4 oxidation state besides + 3 oxidation state. [Delhi 2002C]

Write the atomic number of the element in which the filhng of 3d subshell in the atom just starts. [...

Short answer question

Write the atomic number of the element in which the filhng of 3d subshell in the atom just starts. [AI 2002C]

Why do Zr and Hf exhibit similar properties ? [Delhi 1999C; AI 2001]

Short answer question

Why do Zr and Hf exhibit similar properties ? [Delhi 1999C; AI 2001]

What is lanthanoid contraction ? [AI 2000; Foreign 2001]

Short answer question

What is lanthanoid contraction ? [AI 2000; Foreign 2001]

What is basic difference between the electronic configuration of lanthanoids and those of actinoids ...

Short answer question

What is basic difference between the electronic configuration of lanthanoids and those of actinoids ? [AI 1999, 99C; Foreign 2001]

Name one ore of manganese and chromium. [AI & Foreign 2000]

Short answer question

Name one ore of manganese and chromium. [AI & Foreign 2000]

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