Podcast
Questions and Answers
Which of the following statements about adsorption is NOT TRUE?
Which of the following statements about adsorption is NOT TRUE?
- Adsorption leads to a lower concentration of molecules on the surface. (correct)
- Adsorption is rapid in the beginning and slows down near equilibrium.
- Adsorption is a surface phenomenon.
- Adsorption results in a higher concentration of molecules on the surface.
What is the primary cause of adsorption?
What is the primary cause of adsorption?
- van der Waals forces between molecules and surface.
- Unbalanced forces of attraction or free valencies on the surface. (correct)
- Hydrogen bonding between molecules and surface.
- Electrostatic forces between molecules and surface.
What is the characteristic of the concentration of adsorbed molecules during adsorption?
What is the characteristic of the concentration of adsorbed molecules during adsorption?
- It is uniform throughout the surface.
- It reaches a plateau at equilibrium.
- It decreases with time.
- It is always greater at the surface than in the bulk. (correct)
What is the term for the branch of physical chemistry that deals with the nature of surfaces and chemical and physical processes on surfaces?
What is the term for the branch of physical chemistry that deals with the nature of surfaces and chemical and physical processes on surfaces?
What is an example of adsorption?
What is an example of adsorption?
What is the minimum size of the particles that can form micelles?
What is the minimum size of the particles that can form micelles?
What is the process by which oxygen or other oxidizing agents can be used to obtain a colloidal solution of sulphur?
What is the process by which oxygen or other oxidizing agents can be used to obtain a colloidal solution of sulphur?
What is the term for the temperature above which the formation of micelles takes place?
What is the term for the temperature above which the formation of micelles takes place?
What is the characteristic of micelles that enables them to form ions?
What is the characteristic of micelles that enables them to form ions?
What is the maximum number of molecules that can be present in a micelle?
What is the maximum number of molecules that can be present in a micelle?
What is the primary reason for the increase in the tendency of adsorption when a solid substance is broken into two pieces?
What is the primary reason for the increase in the tendency of adsorption when a solid substance is broken into two pieces?
What is the characteristic of an adsorption process that is accompanied by a decrease in the free energy change of the system?
What is the characteristic of an adsorption process that is accompanied by a decrease in the free energy change of the system?
What type of adsorption occurs when a gas is adsorbed on a solid surface and can be completely removed in vacuum?
What type of adsorption occurs when a gas is adsorbed on a solid surface and can be completely removed in vacuum?
What is the role of surface atoms in adsorption?
What is the role of surface atoms in adsorption?
What is the term for the existence of a higher concentration of a particular component at the surface of a liquid or a solid phase?
What is the term for the existence of a higher concentration of a particular component at the surface of a liquid or a solid phase?
What is the primary function of enzymes in biological systems?
What is the primary function of enzymes in biological systems?
What is the term used to describe enzymes that catalyze biochemical reactions?
What is the term used to describe enzymes that catalyze biochemical reactions?
Which of the following enzymes is involved in the breakdown of starch?
Which of the following enzymes is involved in the breakdown of starch?
What is the general composition of enzymes?
What is the general composition of enzymes?
What is the role of Zymase in biochemical reactions?
What is the role of Zymase in biochemical reactions?
What type of catalysis involves a catalyst and reactants in different phases?
What type of catalysis involves a catalyst and reactants in different phases?
What is the term for a catalyst that accelerates the rate of a chemical reaction and is also a product of the reaction?
What is the term for a catalyst that accelerates the rate of a chemical reaction and is also a product of the reaction?
What is the process in which one reaction influences the rate of another reaction that does not occur under ordinary conditions?
What is the process in which one reaction influences the rate of another reaction that does not occur under ordinary conditions?
What is the role of Mn²⁺ ions in the reaction?
What is the role of Mn²⁺ ions in the reaction?
What is the purpose of Pt(s) in the contact process for H₂SO₄?
What is the purpose of Pt(s) in the contact process for H₂SO₄?
What is the primary function of nitrogenase in leguminous plants?
What is the primary function of nitrogenase in leguminous plants?
Which enzyme is responsible for catalyzing the reaction of CO2 with H2O in the human body?
Which enzyme is responsible for catalyzing the reaction of CO2 with H2O in the human body?
What is the characteristic feature of zeolites that permits cavities of different sizes?
What is the characteristic feature of zeolites that permits cavities of different sizes?
What is the primary factor that determines the reaction-selectivity of zeolites?
What is the primary factor that determines the reaction-selectivity of zeolites?
What is the function of invertase in the manufacturing of ethyl alcohol?
What is the function of invertase in the manufacturing of ethyl alcohol?
