The qualitative sketches I, II and III given below show the variation of surface tension with molar concentration of three different aquecous solutions $KCl, {CH}_{3} OH$ and ${CH}_{3} {({CH}_{2})}_{11} {OSO}_{3}^{-} {Na}^{+}$ at room temperature. The correct assigment of the sketches

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

$\begin{array}{lll} I : KCl II : {CH}_{3} OH III : {CH}_{3} {({CH}_{2})}_{11} {OSO}_{3}^{-} {Na}^{+} \end{array}$

$\begin{array}{lll} I : {CH}_{3} {({CH}_{2})}_{11} {OSO}_{3}^{-}^{-} {Na}^{+} II : {CH}_{3} OH III : KCl \end{array}$

$I) KCl II) {CH}_{3} {({CH}_{2})}_{11} {OSO}_{3}^{-} {Na}^{+} III : {CH}_{3} OH$

$D) I : {CH}_{3} OH II : KCl III: {CH}_{3} {({CH}_{2})}_{11} {OSO}_{3}^{-} {Na}^{+}$

answer is D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

For KCl curve – Increase of surface tension for inorganic salts.For CH₃OH curve – Decrease of surface tension progressively for alcohols For ${CH}_{3} {({CH}_{2})}_{11} {OSO}_{3}^{-} {Na}^{+}$ curve – Decrease of surface tension before CMC (Critical Micelle Concentration) and then almost unchanged

Watch 3-min video & get full concept clarity