Explain the oxidation states of 4d series elements.

What are actinides? Give three examples.

Describe the preparation of potassium dichromate.

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

Complete the following.
a. 3MnO₄^2- + 4H⁺ ⟶?
b. C₆H₅CH₃ \(\overset { acidified }{ \underset { KMnO_{ 4 } }{ \longrightarrow } } \)?
c. MnO₄^- + Fe²⁺ ⟶?
d. KMnO₄ \(\overset { \triangle }{ \underset { Red\ hot }{ \longrightarrow } } \) ?
e. Cr₂O₇^2- + 6I^- + 14H⁺ ⟶?
f. Na₂Cr₂O₇ + 2KCl ⟶?

What are interstitial compounds?

Calculate the number of unpaired electrons in Ti³⁺ , Mn²⁺ and calculate the spin only magnetic moment.

Write the electronic configuration of Ce⁴⁺ and Co²⁺.

Explain briefly how +2 states becomes more and more stable in the first half of the first row transition elements with increasing atomic number.

Why first ionization enthalpy of chromium is lower than that of zinc?

Transition metals show high melting points. Why?