Hello,

Important questions from d and f block elements are-

• What is meant by ‘lanthanoid contraction’?
• Why do transition elements show variable oxidation states?
• Write the formula of an oxo-anion of Manganese (Mn) in which it shows the oxidation state equal to its group number.
• What happens when (NH4)2Cr2O7 is heated?
• Write the formula of an oxo-anion of Chromium (Cr) in which it shows the oxidation state equal to its group number.

Hope this helps!!

Thank you.