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NTA Abhyas NEET2020Chemistryp Block Elements (Group 15, 16, 17 & 18)Practice

The oxidation states of P in the following compounds H 3 PO 3, PCl 3, Ca 3 P 2, Na 3 PO 4, ​POF 3 are respectively be

Options

  1. A+ 3, + 3, - 3, + 5, + 5
  2. B+ 5, + 5, - 3, + 3, + 3
  3. C+ 4, + 3, - 3, + 4, + 5
  4. D+ 3, + 3, - 2, + 4, + 5

Correct answer

A. + 3, + 3, - 3, + 5, + 5

Step-by-step solution

Let the oxidation state of phosphorus be x. (i) H 3 PO 3 (3 × + 1) + x + (3 × - 2) = 0 x = + 3 (ii) PCl 3 x + (3 × - 1) x = + 3 (iii) Ca 3 P 2 (3 × + 2) + 2x x = - 3 (iv) Na 3 PO 4 (3 × 1) + x + (4 × - 2) x = + 5 (v) POF 3 x + (- 2) + (3 × - 1) x = + 5

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