Three graphs for R(CH_2)_nCOONa are shown. Th | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The given graphs represent the variation of molar conductivity $(\Lambda_m^c)$ with the square root of concentration $(\sqrt{c})$ for surfactants.

Vedclass · Accepted Answer

$I-16, II-12, III-8$

Vedclass · Answer

(A) The given graphs represent the variation of molar conductivity $(\Lambda_m^c)$ with the square root of concentration $(\sqrt{c})$ for surfactants. The sharp decrease in conductivity corresponds to the Critical Micelle Concentration $(CMC)$.As the length of the hydrophobic tail (represented by '$n$' in $R(CH_2)_nCOONa$) increases,the hydrophobicity increases,which facilitates micelle formation at lower concentrations.Therefore,$CMC \propto \frac{1}{	ext{Size of tail}}$.Looking at the graphs,the $CMC$ values (the point of the sharp break) follow the order: $I This implies the tail size follows the order: $I > II > III$.Matching this with the given options,graph $I$ corresponds to the largest '$n$' $(16)$,graph $II$ to $12$,and graph $III$ to $8$.

Three graphs for $R(CH_2)_nCOONa$ are shown. The correct values of '$n$' for graphs $I, II,$ and $III$ may be matched as:

Similar Questions

$A$ negatively charged suspension of clay in water will need for precipitation the minimum amount of

Which one of the following is not a colloidal solution?

Which of the following is an example of a hydrophobic sol?

Which of the following nanostructures includes nanotubes as an example?

Under the influence of an electric field,the particles in a sol migrate towards the cathode. The coagulation of the same sol is studied using $NaCl$,$Na_2SO_4$,and $Na_3PO_4$ solutions. Their coagulating values will be in the order:

Vedclass Test Series

Exam Paper Generator

Online Exam Module