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QJEEAdv16Ch2d54: JEE Advanced 2016 Chemistry - Class 12 JEEAdv16Ch2d54 Solution: The qualitative sketches I, II and III given below show the…

The qualitative sketches I, II and III given below show the variation of surface tension with molar concentration of three different aqueous solutions of KCl, CH3OH and CH3(CH2)11 OSO 3−_3^ - Na+ at room temperature. The correct assignment of the sketches is

JEE Advanced 2016 Paper 2 Offline Chemistry - Solutions Question 8 English

Multiple Choice Options

  • A I : KCl II : CH3OH III : CH3(CH2)11 OSO 3−_3^ - Na+
  • B I. CH3(CH2)11 OSO 3−_3^ - Na+ II. CH3OH III. KCl
  • C I. KCl II. CH3(CH2)11 OSO 3−_3^ - Na+ III. CH3OH
  • D I. CH3OH II. KCl III. CH3(CH2)11 OSO 3−_3^ - Na+

Step-by-Step Verified Solution

I. (CH3OH) : Surface tension decreases as concentration increases.

II. (KCl) : Surface tension increases with concentration for ionic salt.

III. [CH3(CH2)11 OSO 3−_3^ - Na+] : It is an anionic detergent.

There is decrease in surface tension before micelle formation, and after CMC (Critical Micelle Concentration) is attained, no change in surface tension.

JEE Advanced 2016 Paper 2 Offline Chemistry - Solutions Question 8 English Explanation

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