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Home Questions MQE8YGXF7V
Target Exam

CUET

Subject

Chemistry

Chapter

Inorganic: D and F Block Elements

Question:

The pair of compounds in which both the metals are in the highest possible oxidation state is:

Options:

\([Co(CN)_6]^{3–}\), \(MnO_2\)

\(CrO_2Cl_2, MnO_4^–\)

\(TiO_3, MnO_2\)

\([Fe(N_)6]^{3–}, [Co(CN)_6]^{3–}\)

Correct Answer:

\(CrO_2Cl_2, MnO_4^–\)

Explanation:

The correct answer is (2) \(CrO_2Cl_2, MnO_4^–\)

The highest oxidation state of Cr is +6, and the highest oxidation state of Mn is +7. In \(CrO_2Cl_2\), the oxidation state of Cr is +6, and in\(MnO_4^–\), the oxidation state of Mn is +7. Therefore, both metals are in their highest possible oxidation state in this pair of compounds.

The other pairs of compounds do not have both metals in their highest possible oxidation state.

  • In \([Co(CN)_6]^{3–}\), the oxidation state of Co is +3, and in \(MnO_2\), the oxidation state of Mn is +4.
  • In \(TiO_3\), the oxidation state of Ti is +4, and in \(MnO_2\), the oxidation state of Mn is +4.
  • In \([Fe(N_)6]^{3–}\), the oxidation state of Fe is +3, and in \([Co(CN)_6]^{3–}\), the oxidation state of Co is +3.

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