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JEE Main202125 Jul 2021Morning ShiftChemistryd and f Block ElementsActual

The correct order of following 3 d metal oxides, according to their oxidation numbers is : (a) CrO 3 (b) Fe 2 O 3 (c) MnO 2 (d) V 2 O 5 (e) Cu 2 O

Options

  1. A( d ) > ( a ) > ( b ) > ( c ) > ( e )
  2. B( a ) > ( c ) > ( d ) > ( b ) > ( e )
  3. C( a ) > ( d ) > ( c ) > ( b ) > ( e )
  4. D( c ) > ( a ) > ( d ) > ( e ) > ( b )

Correct answer

C. ( a ) > ( d ) > ( c ) > ( b ) > ( e )

Step-by-step solution

(a) Cr + 6 O 3 (b) Fe + 3 2 O 3 (c) Mn + 4 O 2 (d) V + 5 2 O 5 (e) Cu + 1 2 O So order of oxidation state a > d > c > b > e

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