Surface Chemistry

When $\ce{O2}$ is adsorbed on a metallic surface, electron transfer occurs from the metal to $\ce{O2}$. The TRUE statement(s) regarding this adsorption is(are)

3 g of activated charcoal was added to 50 mL of acetic acid solution (0.06N) in a flask. After an hour it was filtered and the strength of the filtrate was found to be 0.042 N. The amount of acetic acid adsorbed (per gram of charcoal) is :

Match the catalysts to the correct processes :

The following statements relate to the adsorption of gases on a solid surface. Identify the incorrect statement among them :

Under ambient conditions, which among the following surfactants will form micelles in aqueous solution at lowest molar concentration ?

Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at 25 °C. For this process, the correct statement is

Choose the correct reason(s) for the stability of the lyophobic colloidal particles.

The given graphs / data I, II, III and IV represent general trends observed for different physisorption and chemisorption processes under mild conditions of temperature and pressure. Which of the following choice(s) about I, II, III and IV is (are) correct?

The correct statement(s) pertaining to the adsorption of a gas on a solid surface is (are)

Among the electrolytes $\ce{Na2SO4}$, $\ce{CaCl2}$, $\ce{Al2(SO4)3}$ and $\ce{NH4Cl}$, the most effective coagulating agent for $\ce{Sb2S3}$ sol is

Among the following, the surfactant that will form micelles in aqueous solution at the lowest molar concentration at ambient conditions is

STATEMENT-1: Micelles are formed by surfactant molecules above the critical micellar concentration (CMC).

because

STATEMENT-2: The conductivity of a solution having surfactant molecules decreases sharply at the CMC.