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* Only One Correct Option
The qualitative sketches I, II and III given below show the
\( \mathrm{P} \) variation of surface tension with molar concentration of three

WV different aqueous solutions of \( \mathrm{KCl}, \mathrm{CH}_{3} \mathrm{OH} \) and \( \mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{11} \mathrm{OSO}_{3}^{-} \mathrm{Na}^{+} \)at room temperature. (2016 Adv.)
The correct assignment of the sketches is
\( \begin{array}{rrc}\mathrm{I} & \mathrm{II} & \mathrm{III} \\ \text { (a) } \mathrm{KCl} & \mathrm{CH}_{3} \mathrm{OH} & \mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{11} \mathrm{OSO}_{3}^{-} \mathrm{Na}^{+}\end{array} \)
(b) \( \mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{11} \mathrm{OSO}_{3}^{-} \mathrm{Na}^{+} \mathrm{CH}_{3} \mathrm{OH} \quad \mathrm{KCl} \)
(c) \( \mathrm{KCl} \quad \mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{11} \mathrm{OSO}_{3}^{-} \mathrm{Na}^{+} \mathrm{CH}_{3} \mathrm{OH} \)
(d) \( \mathrm{CH}_{3} \mathrm{OH} \)
\( \mathrm{KCl} \quad \mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{11} \mathrm{OSO}_{3}^{-} \mathrm{Na}^{+} \)
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