Lecture -1 Quiz

What is the main feature of adsorption processes?

• High pressure

• Low temperature

• Surface-related phenomenon

• Strong chemical bonds

Which material was used commercially for decolorizing sugar solutions in the late 18th century?

• Activated carbon

• Bone char

• Silica gel

• Zeolite

In the mid-19th century, what was wood charcoal primarily used for in hospitals?

• Fuel for heating

• Blood purification

• Air purification

• Cooking

Which industry is largest and widely uses adsorption processes for molecular separations?

• Food industry

• Automotive industry

• Petrochemical industry

• Textile industry

What characterizes adsorption processes in terms of the adsorbate's interaction with the adsorbent?

• Stronger than chemical bonds

• Weak forces

• Irreversible

• Insensitive to temperature changes

What is the importance of desorption in adsorption processes?

• It allows for easy disposal of adsorbents.

• It increases the pressure inside the adsorption vessel.

• It permits reuse of the adsorbent for further cycles.

• It enhances the strength of chemical bonds.

Which factor mainly determines the pore size and void volume of zeolites?

• Exchange cations

• Temperature

• Framework structure

• Electric field effects

What role do exchange cations play in zeolites?

• They determine the color of the zeolite.

• They control the pH of the zeolite.

• They affect molecular-sieve behavior and adsorption selectivity.

• They act as catalysts for zeolite synthesis.

What is the primary goal when optimizing zeolite-binder combinations for particle formation?

• Maximum density and mechanical attrition resistance

• Minimum density and maximum diffusion resistance

• Maximum crystallization time

• Maximum supersaturation

Why is optimizing zeolite-binder combinations essential for adsorption and catalysis processes?

• To reduce the cost of manufacturing

• To maximize diffusion resistance

• To maintain a high volumetric adsorption capacity

• To minimize mechanical attrition resistance