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NEETChemistryd and f Block Elements

Match List-I with List-II regarding the properties of manganese compounds. List-I List-II (A) KMnO ₄ (I) Green paramagnetic solid (B) K ₂ MnO ₄ (II) Purple diamagnetic solid (C) MnO ₂ (III) Green oil (D) Mn ₂ O ₇ (IV) Black/brown solid Choose the correct answer from the options given below:

Options

  1. A(A)-(I), (B)-(II), (C)-(IV), (D)-(III)
  2. B(A)-(II), (B)-(III), (C)-(IV), (D)-(I)
  3. C(A)-(II), (B)-(I), (C)-(III), (D)-(IV)
  4. D(A)-(II), (B)-(I), (C)-(IV), (D)-(III)

Correct answer

D. (A)-(II), (B)-(I), (C)-(IV), (D)-(III)

Step-by-step solution

KMnO ₄ contains Mn in the +7 oxidation state ( 3d^0 ). It is a purple diamagnetic solid. K ₂ MnO ₄ contains Mn in the +6 oxidation state ( 3d^1 ). Due to the presence of one unpaired electron, it is a green paramagnetic solid. MnO ₂ is a black/brown solid. Mn ₂ O ₇ is a covalent compound and exists as a green oil at room temperature. Therefore, the correct matching is (A)-(II), (B)-(I), (C)-(IV), (D)-(III). Answer: (A)-(II), (B)-(I), (C)-(IV), (D)-(III)

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