Class 12 Surface Chemistry MCQs with answers

Class 12 Surface Chemistry MCQs with answers, Surface chemistry deals with phenomena that occur at the surfaces or interfaces. The interface or surface is represented by separating the bulk phases by a hyphen or a slash. For example, the interface between a solid and a gas may be represented by solid gas or solid/gas. These MCQs are based on the CBSE board curriculum and correspond to the most recent Class 12 chemistry syllabus. By practicing these Class 12 Multiple choice questions, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 12 Annual examinations.

Class 12 Chemistry Chapter Surface Chemistry MCQs with answers

Q1. Which of the following phenomenon occurs when a chalk stick is dipped in ink?

1. Adsorption of coloured substance.
2. Adsorption of solvent.
3. Absorption and adsorption both of solvent.
4. Absoprtion of solvent.

Q2. Extent of adsorption of adsorbate from solution phase increases with __.

1. Increase in amount of adsorbate in solution.
2. Decrease in surface area of adsorbent.
3. Increase in temperature of solution.
4. Decrease in amount of adsorbate in solution.

Q3. Physical adsorption of a gaseous species may change to chemical adsorption with __.

1. Decrease in temperature.
2. Increase in temperature.
3. Increase in surface area of adsorbent.
4. Decrease in surface area of adsorbent.

Q5. Which of the following is an example of absorption?

1. Water on silica gel.
2. Water on calcium chloride.
3. Hydrogen on finely divided nickel.
4. Oxygen on metal surface.

Q6. Which of the following interface cannot be obtained?

1. Liquid-liquid.
2. Solid-liquid.
3. Liquid-gas.
4. Gas-gas.

Q8. Which of the following will show Tyndall effect?

1. Aqueous solution of soap below critical micelle concentration.
2. Aqueous solution of soap above critical micelle concentration.
3. Aqueous solution of sodium chloride.
4. Aqueous solution of sugar.

Q9. In a reaction, catalyst changes __.

1. Physically.
2. Qualitatively.
3. Chemically.
4. Quantitatively.

Q11. The term ‘sorption’ stands for __.

1. Absorption
2. Adsorption
3. Both absorption and adsorption
4. Desorption

Q12. Which of the following statements are correct about solid catalyst?

1. Same reactants may give different product by using different catalysts.
2. Catalyst does not change of reaction.
3. Catalyst is required in large quantities to catalyse reactions.
4. Catalytic activity of a solid catalyst does not depend upon the strength of chemisorption.

Q15. Which of the following options are correct?

1. Micelle formation by soap in aqueous solution is possible at all temperatures.
2. Micelle formation by soap in aqueous solution occurs above a particular concentration.
3. On dilution of soap solution micelles may revert to individual ions.
4. Soap solution behaves as a normal strong electrolyte at all concentrations.

Q16. Which of the following statements are correct?

1. Mixing two oppositely charged sols neutralises their charges and stabilises the colloid.
2. Presence of equal and similar charges on colloidal particles provides stability to the colloids.
3. Any amount of dispersed liquid can be added to emulsion without destabilising it.
4. Brownian movement stabilises sols.

Q17. At high concentration of soap in water, soap behaves as __.

1. Molecular colloid
2. Associated colloid
3. Macromolecular colloid
4. Lyophilic colloid

Q18. Method by which lyophobic sol can be protected.

1. By addition of oppositely charged sol.
2. By addition of an electrolyte.
3. By addition of lyophilic sol.
4. By boiling.

Q19. Which of the following process does not occur at the interface of phases?

1. Crystallisation.
2. Heterogenous catalysis.
3. Homogeneous catalysis.
4. Corrosion.

Q20. What happens when a lyophilic sol is added to a lyophobic sol?

1. Lyophobic sol is protected.
2. Lyophilic sol is protected.
3. Film of lyophilic sol is formed over lyophobic sol.
4. Film of lyophobic sol is formed over lyophilic sol.