Multiple choice

Match the List-I (oxy acids of phosphorus) with List-II (oxidation state of P atom). ||| |---|---| |List-I |List-II| |A. Orthophosphoric acid|1. +1| |B. Hypophosphoric acid|2. +3| |C. Phosphorous acid|3. +4| |D. Metaphosphoric acid|4. +5|

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

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

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

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

  5. A - 4, B - 3, C - 4, D - 1
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A Correct answer
Explanation

The oxidation state of P in orthophosphoric acid (H3PO4) is +5. The oxidation state of P in phosphorous acid (H3PO3) is +3. The oxidation state of P in hypophosphoric acid (H4P2O6) is +4. The oxidation state of P in metaphosphoric acid (HPO3) is +5. Hence, the correct representation of the codes is A - 4, B - 3, C - 2, D - 4.

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