$\mathrm{O}-\mathrm{O}$ bond length in $\mathrm{H}_{2} \mathrm{O}_{2}$ is $\underline{\mathrm{X}}$ than the $\mathrm{O}-\mathrm{O}$ bond length in $\mathrm{F}_{2} \mathrm{O}_{2}$. The $\mathrm{O}-\mathrm{H}$ bond length in $\mathrm{H}_{2} \mathrm{O}_{2}$ is $\underline{Y}$ than that of the $\mathrm{O}-\mathrm{F}$ bond in $\mathrm{F}_{2} \mathrm{O}_{2}$.
Choose the correct option for $\underline{X}$ and $\underline{Y}$ from those given below :
Solution
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<table class="tg">
<thead>
<tr>
<th class="tg-amwm">Bond</th>
<th class="tg-amwm">Bond Length</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tg-baqh">O - O</td>
<td class="tg-baqh">$1.48 \,\mathop A\limits^o\left(\text { In }{\mathrm{H}_2 \mathrm{O}_2}\right)$</td>
</tr>
<tr>
<td class="tg-baqh">O - O</td>
<td class="tg-baqh">$1.22 \,\mathop A\limits^o\left(\text { In }{\mathrm{O}_2 \mathrm{F}_2}\right)$</td>
</tr>
</tbody>
</table>
<br/>Thus, $\mathrm{O}-\mathrm{O}$ bond length in $\mathrm{H}_2 \mathrm{O}_2$ is longer than $\mathrm{O}-\mathrm{O}$ bond length in $\mathrm{O}_2 \mathrm{~F}_2$.
<br/><br/><style type="text/css">
.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}
.tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;}
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.tg .tg-amwm{font-weight:bold;text-align:center;vertical-align:top}
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<table class="tg">
<thead>
<tr>
<th class="tg-amwm">Bond</th>
<th class="tg-amwm">Bond Length</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tg-baqh">O - F</td>
<td class="tg-baqh">$158 \,\mathrm{pm}\left(\text { In }{\mathrm{O}_2 \mathrm{F}_2}\right)$</td>
</tr>
<tr>
<td class="tg-baqh">O - H</td>
<td class="tg-baqh">$95 \,\mathrm{pm}\left(\text { In }{\mathrm{H}_2 \mathrm{O}_2}\right)$</td>
</tr>
</tbody>
</table>
<br/>Thus, the $\mathrm{O}-\mathrm{H}$ bond length in $\mathrm{H}_2 \mathrm{O}_2$ is shorter than $\mathrm{O}-\mathrm{F}$ bond length in $\mathrm{O}_2 \mathrm{~F}_2$.
About this question
Subject: Chemistry · Chapter: Chemical Bonding and Molecular Structure · Topic: Ionic and Covalent Bonding
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