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NTA Abhyas JEE Main2020Chemistryd and f Block ElementsPractice

Which option is not matched in correct sequence

Options

  1. Ad 5 , d 3 , d 1 , d 4 → increasing magnetic moment
  2. BM O , M 2 O 3 , M O 2 , M 2 O 5 → decreasing basic strength
  3. CSc, V, Cr, Mn → increasing number of oxidation state
  4. DC o 2 + , F e + 3 , C r + 3 , S c + 3 → increasing stability

Correct answer

A. d 5 , d 3 , d 1 , d 4 → increasing magnetic moment

Step-by-step solution

A. As Increasing order of magnetic moment will be d 1 , d 3 , d 4 , d 5 so this one is not correct B. As the oxidation state of metal increases, acidic strength increases so this one is correctly matched C. Mn has the highest oxidation state of +7

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