Select the incorrect statement:

Which of the following is effectively used to remove $E. coli$ bacteria from water?

What is the cause of the Tyndall effect in a colloidal solution?

Which of the following information is incorrect?

Identify the correct decreasing order of precipitation power of the flocculating ion added from the following.

Molar conductivity $\left(\Lambda_m\right)$ of an aqueous solution of sodium stearate,which behaves as a strong electrolyte,is recorded at varying concentrations $(c)$ of sodium stearate. Which one of the following plots provides the correct representation of micelle formation in the solution? (Critical micelle concentration $(CMC)$ is marked with an arrow in the figures.)