MCQ
Cleansing action of soap occurs because:
  • Oil and grease can be absorbed into the hydrophobic centres of soap micelles and washed away.
  • B
    Oil and grease can be absorbed into hydrophilic centres of soap micelles and washed away.
  • C
    Oil and grease can be absorbed into both hydrophilic and hydrophobic centres but cannot be washed away.
  • D
    Cleansing action is not related to micelles.

Answer

Correct option: A.
Oil and grease can be absorbed into the hydrophobic centres of soap micelles and washed away.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Fluorine is prepared by
Identify $'Z'$ in the following reaction series $C{H_3}C{H_2}C{H_2}Br \xrightarrow{{NaOH(aq.)}} (X) \xrightarrow[{Heat}]{{A{l_2}{O_3}}} (Y) \xrightarrow{{HOCl}} (Z)$ 
Of the following four aqueous solutions, total number of those solutions whose freezing point is lower than that of $0.10\, \mathrm{M} \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}$ is (Integer answer)

$(i)$ $0.10\, \mathrm{M} \,\mathrm{Ba}_{3}\left(\mathrm{PO}_{4}\right)_{2}$            $(ii)$ $0.10\, \mathrm{M}\, \mathrm{Na}_{2} \mathrm{SO}_{4}$             $(iii)$ $0.10\, \mathrm{M}\, \mathrm{KCl}$          $(iv)$ $0.10 \,\mathrm{M} \,\mathrm{Li}_{3} \mathrm{PO}_{4}$

$KMn{O_4}$ acts as an oxidising agent in the neutral medium and gets reduced to $Mn{O_2}$. The equivalent weight of $KMn{O_4}$ in neutral medium
The correct order for the wavelength of absorption in the visible region is
Collision diameter is least in case of:
The sugar present in fruits is
For the electrochemical cell, $M|{M^ + }||{X^ - }|X,$ ${E^o}({M^ + }/M)$ $= 0.44\, V$  and ${E^o}(X/{X^ - })$ $= 0.33\,V$. From this data one can deduce that
A sugar, that is not a disaccharide, among the following is
The equivalent conductances of two strong electrolytes at infinite dilution in $H_2O$ (where ions move freely through a solution) at $25^o C$ are given below : 

$\Lambda _{C{H_3}COONa}^o =91.0\, S \,cm^2 /equiv.$

$\Lambda _{HCl}^o =426.2 \,S \,cm^2 /equiv.$

What additional information$/$quantity one needs to calculate ${\Lambda ^o}$ of an aqueous solution of acetic acid ?