Verified Solution • 2025–26 Session moderate

QJEEM23Chc9da: JEE Main 2023 Chemistry - Class 11 JEEM23Chc9da Solution: bond length in is than the bond length in . The bond length in…

O−O\mathrm{O}-\mathrm{O} bond length in H2O2\mathrm{H}_{2} \mathrm{O}_{2} is X‾\underline{\mathrm{X}} than the O−O\mathrm{O}-\mathrm{O} bond length in F2O2\mathrm{F}_{2} \mathrm{O}_{2} . The O−H\mathrm{O}-\mathrm{H} bond length in H2O2\mathrm{H}_{2} \mathrm{O}_{2} is Y‾\underline{Y} than that of the O−F\mathrm{O}-\mathrm{F} bond in F2O2\mathrm{F}_{2} \mathrm{O}_{2} .

Choose the correct option for X‾\underline{X} and Y‾\underline{Y} from those given below :

Multiple Choice Options

  • A X\mathrm{X} - shorter, Y\mathrm{Y} - longer
  • B X\mathrm{X} - longer, Y\mathrm{Y} - shorter
  • C X\mathrm{X} - shorter, Y\mathrm{Y} - shorter
  • D X\mathrm{X} - longer, Y\mathrm{Y} - longer

Step-by-Step Verified Solution

Bond Bond Length
O - O 1.48 Ao( In H2O2)1.48 \,\mathop A\limits^o\left(\text { In }{\mathrm{H}_2 \mathrm{O}_2}\right)
O - O 1.22 Ao( In O2F2)1.22 \,\mathop A\limits^o\left(\text { In }{\mathrm{O}_2 \mathrm{F}_2}\right)

Thus, O−O\mathrm{O}-\mathrm{O} bond length in H2O2\mathrm{H}_2 \mathrm{O}_2 is longer than O−O\mathrm{O}-\mathrm{O} bond length in O2 F2\mathrm{O}_2 \mathrm{~F}_2 .

Bond Bond Length
O - F 158 pm( In O2F2)158 \,\mathrm{pm}\left(\text { In }{\mathrm{O}_2 \mathrm{F}_2}\right)
O - H 95 pm( In H2O2)95 \,\mathrm{pm}\left(\text { In }{\mathrm{H}_2 \mathrm{O}_2}\right)

Thus, the O−H\mathrm{O}-\mathrm{H} bond length in H2O2\mathrm{H}_2 \mathrm{O}_2 is shorter than O−F\mathrm{O}-\mathrm{F} bond length in O2 F2\mathrm{O}_2 \mathrm{~F}_2 .

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