Question

When sodium lauryl sulphate is dissolved in water in an appreciable amount, micelle formation takes place. Which of the following options is correct regarding the formation process?

• A. Micelle formation can occur at any temperature
• B. At substantially lower concentrations as concentration increases, conductivity should decrease.
• C. On dilution micelle molar conductance should decrease.
• D. The micelle formation in given case will lead to formation in given case will lead to formation of positively charged colloid.

Answer 1

The correct option is B At substantially lower concentrations as concentration increases, conductivity should decrease.

At substantially lower concentrations as concentration increases , conductivity increases. Micelle formation can occur at above critical micelle concentration which is at 25${}^0$C for sodium lauryl sulphate. It doesnt form a positively charged colloid .