Surface Chemistry Additional Practice Test

12th Standard Chemistry — Surface Chemistry: Additional Online Practice Test

Pick how many questions you want and set a time limit, then start. You'll get your score at the end with the correct answer and an explanation for every question. Free, in Tamil and English — 15 questions available.

Set up your test

Number of questions

Time limit

Time remaining00:00

Which of the following conditions defines positive adsorption at an interface?

A.Concentration of the substance at the interface is higher than in the bulk B.Concentration of the substance at the interface is lower than in the bulk C.The substance is distributed uniformly throughout the entire system D.The substance is completely removed from the surface phase

Which type of force is primarily responsible for physical adsorption (physisorption)?

A.Strong covalent chemical bonds B.Weak Van der Waals forces C.Electrostatic forces between ions D.Metallic bonding interactions

Based on the nature of the adsorbate, which of the following gases will be adsorbed most readily on the surface of charcoal?

A.Hydrogen (\(H_2\)) B.Nitrogen (\(N_2\)) C.Oxygen (\(O_2\)) D.Sulphur dioxide (\(SO_2\))

In the Freundlich adsorption isotherm, what does the slope represent in a plot of \(\log(x/m)\) against \(\log p\)?

A.\(\log K\) B.\(K\) C.\(1/n\) D.\(n\)

In the industrial synthesis of ammonia by Haber's process, what is the role of Molybdenum (Mo)?

A.Catalyst B.Promoter C.Catalytic poison D.Adsorbate

Which theory of catalysis explains that the reaction rate increases due to the formation of active centres on a rough surface?

A.Intermediate compound formation theory B.Adsorption theory C.Collision theory D.Electronic theory

In the mechanism of enzyme action, which part is represented by the 'Lock' according to the lock and key model?

A.Substrate B.Co-enzyme C.Enzyme D.Product

How did Thomas Graham distinguish colloids from crystalloids during his research on diffusion?

A.Based on their solubility in organic solvents B.Based on their ability to diffuse through a membrane C.Based on their boiling point elevations D.Based on their magnetic properties

Which of the following common substances is an example of a 'Sol' (solid dispersed in liquid)?

A.Smoke B.Ink C.Cloud D.Cheese

Q10

Which preparation method involves striking an electric arc between metal electrodes to create a colloidal solution of metals like gold?

A.Peptization B.Bredig's arc method C.Ultrasonic dispersion D.Dialysis

Q11

What is the process of removing ionic impurities from a colloidal solution using a semi-permeable membrane called?

A.Condensation B.Dialysis C.Coagulation D.Peptization

Q12

Which optical property of colloidal solutions explains why the sky appears blue?

A.Tyndall effect B.Brownian movement C.Electrophoresis D.Sedimentation

Q13

According to the Hardy-Schulze rule, which of the following ions has the highest coagulating power for a negatively charged \(As_2S_3\) sol?

A.\(Na^+\) B.\(Ba^{2+}\) C.\(Al^{3+}\) D.\(Cl^-\)

Q14

What is meant by the 'inversion of phase' in the study of emulsions?

A.The complete separation of oil and water layers B.The change of a water-in-oil (W/O) emulsion into an oil-in-water (O/W) emulsion C.The conversion of an emulsion into a solid gel D.The process where the dispersed phase evaporates

Q15

In the leather industry, what is the specific role of adding tannin to animal hides?

A.To dissolve the hair present on the skin B.To coagulate the positively charged protein particles in the skin C.To act as a coloring agent for the final leather product D.To increase the water content of the hides

More for this chapter

About this Surface Chemistry test

This free online practice test covers Surface Chemistry from the 12th Standard Chemistry (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

More chapters in Chemistry

View all