The d- and f-Block Elements

Class 12 · Chemistry · 44 Questions

4.1intermediate💡 Understand2 marksShort Answer

Silver atom has completely filled d orbitals ( $4d^{10}$ ) in its ground state. How can you say that it is a transition element?

4.3beginner🧠 Remember2 marksShort Answer

Which of the 3d series of the transition metals exhibits the largest number of oxidation states and why?

4.4intermediate🔍 Analyze2 marksShort Answer

The E^⊖( $M^{2+}$ /M) value for copper is positive (+0.34V). What is possible reason for this? (Hint: consider its high Δ_aH^⊖ and low Δ_{hyd}H^⊖)

4.5intermediate💡 Understand2 marksShort Answer

How would you account for the irregular variation of ionisation enthalpies (first and second) in the first series of the transition elements?

4.6intermediate💡 Understand2 marksShort Answer

Why is the highest oxidation state of a metal exhibited in its oxide or fluoride only?

4.7intermediate🔧 Apply2 marksShort Answer

Which is a stronger reducing agent $Cr^{2+}$ or $Fe^{2+}$ and why?

4.10intermediate💡 Understand2 marksShort Answer

Actinoid contraction is greater from element to element than lanthanoid contraction. Why?

4.1beginner🧠 Remember3 marksShort Answer

Write down the electronic configuration of:

4.2intermediate💡 Understand2 marksShort Answer

Why are $Mn^{2+}$ compounds more stable than $Fe^{2+}$ towards oxidation to their +3 state?

4.3intermediate💡 Understand2 marksShort Answer

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

4.4intermediate🔍 Analyze5 marksLong Answer

To what extent do the electronic configurations decide the stability of oxidation states in the first series of the transition elements? Illustrate your answer with examples.

4.5intermediate🔧 Apply2 marksShort Answer

What may be the stable oxidation state of the transition element with the following d- electron configurations in the ground state of their atoms: $3d^{3}$ , $3d^{5}$ , $3d^{8}$ and $3d^{4}$ ?

4.6intermediate🧠 Remember1 markVery Short

Name the oxometal anions of the first series of the transition metals in which the metal exhibits the oxidation state equal to its group number.

4.7intermediate💡 Understand5 marksLong Answer

What is lanthanoid contraction? What are the consequences of lanthanoid contraction?

4.8intermediate💡 Understand5 marksLong Answer

What are the characteristics of the transition elements and why are they called transition elements? Which of the d-block elements may not be regarded as the transition elements?

4.9beginner💡 Understand2 marksShort Answer

In what way is the electronic configuration of the transition elements different from that of the non transition elements?

4.10beginner🧠 Remember2 marksShort Answer

What are the different oxidation states exhibited by the lanthanoids?

4.11intermediate💡 Understand5 marksLong Answer

Explain giving reasons:

4.12beginner🧠 Remember2 marksShort Answer

What are interstitial compounds? Why are such compounds well known for transition metals?

4.13intermediate🔍 Analyze3 marksShort Answer

How is the variability in oxidation states of transition metals different from that of the non transition metals? Illustrate with examples.

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