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Redox Reactions question

2023 · 31 Jan · Shift 1 · Q21
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  5. /2023 · 31 Jan · Shift 1 · Q21

Redox Reactions question

2023 · 31 Jan · Shift 1 · Q21

JEE MainChemistryRedox ReactionsNumerical+4 / −1
The oxidation state of phosphorus in hypophosphoric acid is + ‾\underline{\hspace{2cm}}​.
Numerical answer
View written solutionFree

Correct answer: 4

  1. Write the formula of hypophosphoric acid

    Hypophosphoric acid is: H4P2O6\mathrm{H_4P_2O_6}H4​P2​O6​

  2. Assign usual oxidation states

    • Hydrogen: +1+1+1
    • Oxygen: −2-2−2
    • Let oxidation state of each phosphorus atom be xxx

  3. Form the oxidation state equation

    Since the molecule is neutral: 4(+1)+2x+6(−2)=04(+1) + 2x + 6(-2) = 04(+1)+2x+6(−2)=0

  4. Solve for xxx

    4+2x−12=04 + 2x - 12 = 04+2x−12=0 2x−8=02x - 8 = 02x−8=0 2x=82x = 82x=8 x=4x = 4x=4

  5. Conclusion

    The oxidation state of phosphorus in hypophosphoric acid is: +4+4+4

  6. Comparison with stored answer

    Stored correct answer: 444

    This matches the derived answer.

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