2nd Year Chemistry Chapter 6 Test06.The Transition Metals

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. If overall E° of reaction is positive, the reaction is:
   1. Not feasible
   2. Feasible
   3. Endothermic only
   4. At equilibrium
2. In stability constant expression for [CoCl₄]²⁻, Kstab = ?
   1. [CoCl₄]²⁻ / [Co(H₂O)₆]²⁺ [Cl⁻]⁴
   2. [Co(H₂O)₆]²⁺ / [CoCl₄]²⁻
   3. [Cl⁻]⁴ / [Co(H₂O)₆]²⁺
   4. None
3. Which transition metal is used in aircraft and artificial joints?
   1. Iron
   2. Titanium
   3. Copper
   4. Zinc
4. Which type of isomerism is shown by [Pt(NH₃)₂Cl₂]?
   1. Ionization isomerism
   2. Hydrate isomerism
   3. Geometric isomerism
   4. Optical isomerism
5. Overall standard potential for Cu²⁺ + I⁻ reaction is:
   1. Positive
   2. Zero
   3. Neutral
   4. Negative
6. In the reaction of MnO₄⁻ with ethanedioate (C₂O₄²⁻), MnO₄⁻ is:
   1. Oxidized to MnO₂
   2. Reduced to Mn²⁺
   3. Oxidized to Mn³⁺
   4. Oxidized to Mn³⁺
7. Which transition element has the lowest melting point?
   1. Iron
   2. Zinc
   3. Titanium
   4. Chromium
8. The feasibility of Cu²⁺ + I⁻ reaction occurs due to:
   1. Positive E° value
   2. Precipitation of CuI
   3. Liberation of CO₂
   4. Formation of Mn²⁺
9. Which factor stabilizes variable oxidation states of transition elements?
   1. Low ionization enthalpy
   2. High electronegativity
   3. Half-filled/fully filled subshells
   4. Large atomic size
10. The colour of complexes is due to:
    1. Transfer of protons
    2. d–d electronic transitions
    3. Ionization of ligands
    4. Strong oxidation