SURFACE CHEMISTRY(QUIZ-5) 1 / 5 During the adsorption of gas on the surface of solid, which of the following is true? ΔG 0, ΔS < 0 ΔG > 0, ΔH < 0, ΔS < 0 ΔG < 0, ΔH < 0, ΔS < 0 ΔG < 0, ΔH 0 ΔG < 0, ΔH < 0, ΔS < 0ΔG < 0 means process is spontaneous because adsorption is exothermic in nature, ΔH = negative and entropy is decreasing, i.e., ΔS will come out as negative. 2 / 5 The coagulation values in millimoles per litre of the electrolyte for the coagulation of As2S3 sol are givenNaCl (52)BaCl2 (0.69)MgSO4 (0.22)The correct order of coagulating power is I > II > III II > I > III III > II > I III > I > II III > II > I∵ Lesser the coagulation value, more is coagulating power meaning it is inversely proportional. 3 / 5 The correct ascending order of adsorption of the following gases on the same mass of charcoal at same temperature and pressure is CH4 < H2 < SO2 H2 < CH4 < SO2 SO2 < CH4 < H2 H2 < SO2 < CH4 The extent of adsorption increases with increase in polarity and molar mass so the correct option is b. 4 / 5 The stability of lyophobic sols is due to adsorption of covalent molecules on the colloid the size of the particles the charge on particles Tyndall effect. same charge on particles causes repulsion which further allows particles to settle down. 5 / 5  Which of the following statements are correct about solid catalyst? Same reactants may give different product by using different catalysts. Catalyst does not change AH of reaction. Catalyst is required in large quantities to catalyze reactions. Catalytic activity of a solid catalyst does not depend upon the strength of chemisorption. The Correct Answer Is Same reactants may give different product by using different catalysts. Your score isThe average score is 0% 0% Restart quiz
