To form a complete monolayer of acetic acid on \( 1 \, \mathrm{g} \) of charcoal, \( 100 \, \mathrm{mL} \) of \( 0.5 \, \mathrm{M} \) acetic acid was used. Some of the acetic acid remained unadsorbed. To neutralize the unadsorbed acetic acid, \( 40 \, \mathrm{mL} \) of \( 1 \, \mathrm{M} \) \( \mathrm{NaOH} \) solution was required. If each molecule of acetic acid occupies \( P \times 10^{-23} \, \mathrm{m^2} \) surface area on charcoal, the value of \( P \) is _______.
[Use given data: Surface area of charcoal \( = 1.5 \times 10^{2} \, \mathrm{m^2 \, g^{-1}} \); Avogadro’s number \( (N_A) = 6.0 \times 10^{23} \, \mathrm{mol^{-1}} \)]
Consider the following statements related to colloids.
(I) Lyophobic colloids are not formed by simple mixing of dispersed phase and dispersion medium.
(II) For emulsions, both the dispersed phase and the dispersion medium are liquid.
(III) Micelles are produced by dissolving a surfactant in any solvent at any temperature.
(IV) Tyndall effect can be observed from a colloidal solution with dispersed phase having the same refractive index as that of the dispersion medium.
The option with correct set of statement is:
