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

Write ionic equation for the reaction between Cr₂O₇^-2 iODSand Fe²⁺ ions in acidic medium.

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

Why Europium (II) is more stable than Cerium (II)?

Which is stronger reducing agent Cr+ or Fe²⁺?

Explain why compounds of Cu²⁺ are coloured but those of Zn²⁺ are colourless.

Why do zirconium and Hafnium exhibit similar properties?

What are interstitial compounds?

Explain the variation in E⁰_{M³⁺/M²⁺}  3d series.

Why Zn²⁺ salts are white while Ni²⁺ salts are coloured?

What are actinides? Give three example

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

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

Justify the position of lanthanides and actinides in the periodic table.

Why Europium (II) is more stable than Cerium (II)?

Describe the preparation of potassium dichromate.

Which is stronger reducing agent Cr²⁺ or Fe²⁺?

What are transition metals? Give four examples.

Why europium (II) is more stable than Cerium (II)?

Why is Ce⁴⁺ in aqueous solution is a good oxidising agent?

Which is stronger reducing agent Cr²⁺ or Fe²⁺?

Which is the most common oxidation state of lanthanoides?

Actinoid contraction is greater from element to element than the lanthanoid contraction, why?

Arrange the following in increasing order of acidic character?
CrO₃, CrO, Cr₂O₃

Give the general electronic configuration of actinoides?

Why do transition metals have high enthalpy of hydration?

1. Why Gd³⁺ is colourles?

2. Explain the oxidation states of 3d series elements.

Write the outer electronic configuration of Cr atom (Z=24).

Why lanthanoids are called f block elements?

The E⁰_M²⁺/M value for copper is positive. Suggest a possible reason for this.

Transition metals show high melting points why?

Describe the preparation of potassium dichromate.

1. Which is more stable? Fe³⁺ or Fe²⁺ - explain.

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

Explain why compounds of Cu²⁺ are coloured but those of Zn²⁺ are colourless.

Out of Lu(OH)₃ and La(OH)₃ which is more basic and why?

Comparing La(OH)₃ and Lu(OH)₃, which is more basic and explain why?

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

2. Justify the position of lanthanides and actinides in the periodic table.

Actinoid contraction is greater from element to element than the lanthanoid contraction, why?

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

Why transition elements form complexes? (OR) Why do d-block elements form: complexes?

What are interstitial compounds?

predict which of the following will be coloured in aqueous solution Ti²⁺ , V³⁺ Sc⁴⁺, Cu⁺ ,Sc³⁺, Fe³⁺, Ni²⁺ and Co³⁺

Describe the preparation of potassium dichromate.

What are interstitial compounds?

Justify the position of lanthanides and actinides in the periodic table.

Write the electronic configuration of the element with atomic number 102.

Describe the variable oxidation state of 3d series elements.

What are actinides? Give three examples.

Why Gd³⁺ is colourless?

Compare lanthanides and actinides