Transition Metal Compounds and Catalytic Activity Quiz
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Questions and Answers

Which ion is expected to have the highest magnetic moment among V 4+, Mn 4+, Fe 3+, and Ni 2+?

  • V 4+
  • Fe 3+
  • Mn 4+ (correct)
  • Ni 2+

Which statement is not a consequence of Lanthanoid contraction?

  • Zr and Hf occur together in the earth's crust in their minerals (correct)
  • Zr and Hf have a comparable size
  • 5d series elements have a higher IE1 than 3d or 4d series
  • High density of the period 6 elements

Which transition metal ion is expected to have the highest third ionization enthalpy among V, Mn, Cr, and Fe?

  • Cr
  • Mn (correct)
  • Fe
  • V

In which outer electronic configuration does an atom achieve the highest oxidation state?

<p>(n-1)d8 ns2 (A)</p> Signup and view all the answers

What is the spin-only magnetic moment of Ni 2+ in aqueous solution (in units of Bohr magneton)?

<p>1.73 (C)</p> Signup and view all the answers

Which pair of ions is colorless?

<p>Sc3+, Zn2+ (B)</p> Signup and view all the answers

What is the reason for the high complex forming tendency of transition elements?

<p>They have vacant d-orbitals (D)</p> Signup and view all the answers

Which property contributes to the colored compounds formed by transition metal ions?

<p>D-d transition (D)</p> Signup and view all the answers

Which ion shows the least paramagnetic property?

<p>Cu (A)</p> Signup and view all the answers

Where is the effect of Lanthanoid contraction observed?

<p>Hf (D)</p> Signup and view all the answers

Which ion has a magnetic moment of 1.73 Bohr magneton?

<p>VCl3 (A)</p> Signup and view all the answers

What contributes to the catalytic activity of transition elements and their compounds?

<p>Their ability to adopt multiple oxidation states and their complexing ability (A)</p> Signup and view all the answers

What is the main reason attributed to the tendency of transition elements to form colored compounds?

<p>d-d-transition in the last but one shell. (C)</p> Signup and view all the answers

Among Zn2+, Ni2+, and Cr3+, which statement is true based on their colors?

<p>Only Zn2+ is colorless, and Ni2+ and Cr3+ are colored. (A)</p> Signup and view all the answers

Which oxide of manganese is the most acidic in nature?

<p>Mn2O7 (B)</p> Signup and view all the answers

In general, transition elements exhibit their highest oxidation states in compounds with which elements?

<p>F and O (B)</p> Signup and view all the answers

What are the maximum oxidation states shown by V, Cr, Co, and Sc respectively?

<p>+5, +6, +3, +3 (C)</p> Signup and view all the answers

If a non-metal is added to the interstitial sites of a metal, what happens to the metal?

<p>More ductile (B)</p> Signup and view all the answers

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