Transition Elements MCQs for MDCAT Practice

Chemistry section, Transition Elements chapter. Sample questions from past PMC papers.

1. Question 1
   The central metal atom along with ligand is called:
   • A.Coordination number
   • B.Coordination sphere
   • C.Chelates
   • D.None of these
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2. Question 2
   The chief ore of copper is:
   • A.Cuprite
   • B.Malachite
   • C.Azurite
   • D.Copper Pyrite
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3. Question 3
   The color of Zn2+ compounds is:
   • A.Yellow
   • B.Black
   • C.Blue
   • D.Colorless
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4. Question 4
   Define non-typical transition elements with two examples. _
   • A.lements of group IB and IIB, e.g., Cu and Zn
   • B.lements of group IIIB and IVB, e.g., Sc and Ti
   • C.lements of group IIA and IIIA, e.g., Ca and Al
   • D.lements of group VB and VIB, e.g., V and Cr
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5. Question 5
   A transition element X has a configuration [Ar] 4s03d5 in its +3 oxidation state. Its atomic number is
   • A.25
   • B.22
   • C.26
   • D.19
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6. Question 6
   In which of the following chromium has different oxidation state?
   • A.K2Cr2O7
   • B.CrCl3
   • C.CrO3
   • D.K2CrO4
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7. Question 7
   Geometry of the transition elements depends upon type of orbital hybridization. Which of the following type of orbital hybridization shows octahedral geometry?
   • A.sp3
   • B.dsp2
   • C.dsp3
   • D.d2sp3
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8. Question 8
   Define the term coordination number with two examples.
   • A.The number of atoms or ions immediately surrounding a central atom in a complex, e.g., 4 in [Ni(CO)₄] and 6 in [Fe(CN)₆]³⁻.
   • B.The number of electrons shared between central atom and ligands, e.g., 2 in H₂O and 3 in NH₃.
   • C.The number of bonds formed between the central metal atom and ligands, e.g., 4 in [NiCl₄]²⁻ and 6 in [Co(NH₃)₆]³⁺.
   • D.The number of ligand atoms directly attached to the central metal ion, e.g., 2 in [Ag(NH₃)₂]⁺ and 4 in [Cu(NH₃)₄]²⁺.
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