Which of the following compounds is colourless?

The correct order of increasing oxidizing power in the series _______.

MnO₄^- react with Br^- in alkaline P^H to give ________.

The highest possible oxidation state shown by osmium in its compound is_______.

Which one of the following exhibits highest oxidation state?

Describe the preparation of potassium dichromate.

What is lanthanoid contraction and what are the effects of lanthanoid contraction?

Why do transition metals have high enthalpy of hydration?

Calculate the magnetic moment of Fe³⁺ ion (Atomic no. of Fe = 26)

Silver atom has completely filled d-orbitals (4d¹⁰) in its ground state. How can you say that it is a transition element?

Which is more stable? Fe³⁺ or Fe²⁺? Why ?

Explain why Cr²⁺ is strongly reducing while Mn³⁺ is strongly oxidizing.

Compare the ionization enthalpies of first series of the transition elements.

What are the general properties of f-block elements? (Lanthanides and Actinides)
(i) Electronic configuration
(ii) Oxidation state
(iii) Radii of tripositive ions.

Give reason for the following:
(i) Compounds of transition elements are generally coloured,
(ii) MnO is basic while Mn₂O₇ is acidic.
(iii) Calculate the magnetic moment of a divalent ion in aqueous medium if its atomic number is 26.

Describe the variable oxidation state of 3d series elements.

Which metal in the 3d series exhibits +1 oxidation state most frequently and why?

Write a note on the ionization enthalpy of transition elements.

How are materials classified based on their magnetic properties?