MCQ
Among the following the weakest one is
- AMetallic bond
- BIonic bond
- ✓Van der Waal's force
- DCovalent bond
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(Given $R =0.082\,L\,atm\,K ^{-1}\,mol ^{-1}$ )
$(A)$ Internal energy $(B)$ Irreversible expansion work
$(C)$ Reversible expansion work $(D)$ Molar enthalpy
$\mathrm{Ph}-\mathrm{CH}=\mathrm{CH}_2 \xrightarrow[\text { (iii) } \mathrm{HBr}{(iv) \mathrm{Mg}, ether, then \mathrm{HCHO} / \mathrm{H}_3 \mathrm{O}^{+}}]{{(i)BH_3}{\text { (ii) } \mathrm{H}_2 \mathrm{O}_2,{ }^{\text {(-) }} \mathrm{OH}}} \mathrm{A}$