Here we will provide you the 50+ MCQ Questions of Surface Chemistry for NEET-UG. Surface Chemistry is the chapter 5 in Class XII or Class 12 Chemistry NCERT Unit Surface Chemistry NEET (conducted by NTA) is based on the NCERT book.
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Surface Chemistry NEET MCQ
Which of the following is NOT a characteristic of chemisorption?
a) High energy of adsorption
b) Specificity
c) Reversible process
d) Formation of a chemical bond
Answer: c) Reversible process
The adsorption of a gas on a solid surface increases with an increase in:
a) Temperature
b) Pressure
c) Surface area of the solid
d) All of the above
Answer: d) All of the above
Which of the following statements is true for the Freundlich adsorption isotherm?
a) It is applicable for monolayer adsorption only
b) It assumes that the surface energy of the adsorbent is uniform
c) It is a linear relationship between the amount of gas adsorbed and the pressure
d) It is applicable for both multilayer and monolayer adsorption
Answer: d) It is applicable for both multilayer and monolayer adsorption
Which of the following is NOT a property of colloids?
a) Tyndall effect
b) Brownian motion
c) Osmosis
d) Sedimentation
Answer: c) Osmosis
Which of the following statements is true for emulsions?
a) They are thermodynamically stable systems
b) They are prepared by mixing immiscible liquids with the help of an emulsifying agent
c) They are classified as lyophilic and lyophobic
d) All of the above
Answer: d) All of the above
Which of the following is NOT a function of a catalyst?
a) Increases the rate of reaction
b) Decreases the activation energy of the reaction
c) Changes the equilibrium constant of the reaction
d) Does not undergo any chemical change during the reaction
Answer: c) Changes the equilibrium constant of the reaction
Which of the following is NOT a factor that affects the rate of catalysis by enzymes?
a) Substrate concentration
b) Temperature
c) pH
d) Enzyme concentration
Answer: d) Enzyme concentration
Which of the following is true for a micelle?
a) The head of the surfactant molecule is hydrophobic
b) The tail of the surfactant molecule is hydrophilic
c) The concentration of surfactant is greater at the surface than in the bulk solution
d) The critical micelle concentration (CMC) is the concentration above which micelles start to form
Answer d) The critical micelle concentration (CMC) is the concentration above which micelles start to form
Which of the following is true for Langmuir adsorption isotherm?
a) It assumes that the adsorption of gas molecules is independent of each other
b) It assumes that the surface energy of the adsorbent is non-uniform
c) It describes the formation of multiple layers of adsorbate molecules on the surface
d) It describes the adsorption of a gas on a solid surface where the adsorption sites are limited
Answer: d) It describes the adsorption of a gas on a solid surface where the adsorption sites are limited
Which of the following is NOT a method of preparing colloids?
a) Peptization
b) Dialysis
c) Precipitation
d) Fractional crystallization
Answer d) Fractional crystallization
Which of the following statements is true for heterogeneous catalysis?
a) The catalyst and reactants are in the same phase
b) The reaction rate is independent of the surface area of the catalyst
c) The catalyst is usually in the form of a powder or a wire
d) The catalyst is consumed during the reaction
Answer: c) The catalyst is usually in the form of a powder or a wire
Which of the following statements is NOT true for a Langmuir-Hinshelwood mechanism?
a) The reaction occurs on the surface of the catalyst
b) The reactants adsorb on the catalyst surface
c) The reaction occurs via a series of intermediate steps
d) The rate of the reaction is independent of the concentration of the reactants
Answer: d) The rate of the reaction is independent of the concentration of the reactants
Which of the following is NOT a property of a colloid?
a) Brownian motion
b) Tyndall effect
c) Homogeneity
d) Opalescence
Answer: c) Homogeneity
Which of the following is true for a lyophilic colloid?
a) It is stabilized by a solvent shell
b) It is stabilized by the adsorption of ions on the surface of the colloid particles
c) It is stabilized by the adsorption of a surfactant on the surface of the colloid particles
d) It is thermodynamically unstable
Answer: a) It is stabilized by a solvent shell
Which of the following statements is true for a micelle?
a) It has a high surface area to volume ratio
b) It is formed by the aggregation of hydrophobic groups of surfactant molecules
c) It has a spherical shape
d) It is a type of colloid
Answer: b) It is formed by the aggregation of hydrophobic groups of surfactant molecules
Which of the following is NOT a method for determining the surface tension of a liquid?
a) Capillary rise method
b) Stalagmometric method
c) Drop weight method
d) Mass spectroscopy
Answer: d) Mass spectroscopy
Which of the following is NOT a type of adsorption isotherm?
a) Langmuir adsorption isotherm
b) Freundlich adsorption isotherm
c) BET adsorption isotherm
d) Michaelis-Menten adsorption isotherm
Answer: d) Michaelis-Menten adsorption isotherm
Which of the following statements is NOT true for a heterogeneous catalyst?
a) The catalyst and reactants are in different phases
b) The reaction rate is proportional to the surface area of the catalyst
c) The catalyst is not consumed during the reaction
d) The catalyst affects the activation energy of the reaction
Answer:b) The reaction rate is proportional to the surface area of the catalyst
Which of the following is true for a Zeta potential?
a) It is a measure of the electrostatic repulsion between particles in a colloid
b) It is a measure of the van der Waals forces between particles in a colloid
c) It is a measure of the amount of adsorbed gas on a solid surface
d) It is a measure of the concentration of surfactant in a solution
Answer: a) It is a measure of the electrostatic repulsion between particles in a colloid
Which of the following statements is true for a surfactant?
a) It is a type of emulsifying agent
b) It is a type of catalyst
c) It is a type of reducing agent
d) It is a type of oxidizing agent
Answer: a) It is a type of emulsifying agent
Which of the following is NOT a type of colloidal system?
a) Lyophobic colloids
b) Lyophilic colloids
c) Associated colloids
d) Homogeneous colloids
Answer: d) Homogeneous colloids
Which of the following statements is true for a Langmuir adsorption isotherm?
a) It assumes that all adsorption sites on the surface are equivalent
b) It assumes that the concentration of adsorbate in the bulk phase is constant
c) It assumes that the adsorption of one molecule does not affect the adsorption of another molecule
d) It assumes that the adsorption process is irreversible
Answer: a) It assumes that all adsorption sites on the surface are equivalent
Which of the following is NOT a factor that affects the adsorption of a gas on a solid surface?
a) Temperature
b) Pressure
c) Nature of the gas
d) Nature of the solid surface
Answer: c) Nature of the gas
Which of the following is NOT a type of catalyst poison?
a) Selective poison
b) Homogeneous poison
c) Reversible poison
d) Irreversible poison
Answer d) Irreversible poison
Which of the following statements is true for a micelle?
a) It is formed by the aggregation of hydrophilic groups of surfactant molecules
b) It has a low surface area to volume ratio
c) It has a cylindrical shape
d) It is thermodynamically stable
Answer d) It is thermodynamically stable
Which of the following is NOT a method for determining the size of colloidal particles?
a) Electron microscopy
b) Ultracentrifugation
c) Dynamic light scattering
d) Stalagmometric method
Answer: d) Stalagmometric method
Which of the following is a characteristic of a lyophobic colloid?
a) It is easily dispersed in a solvent
b) It is stabilized by the adsorption of ions on the surface of the colloid particles
c) It is thermodynamically stable
d) It is stabilized by a solvent shell
Answer:b) It is stabilized by the adsorption of ions on the surface of the colloid particles
Which of the following is NOT a factor that affects the stability of a colloid?
a) Presence of electrolytes
b) pH of the solution
c) Surface area of the particles
d) Temperature of the solution
Answer: c) Surface area of the particles
Which of the following is true for a micelle?
a) It is formed by the aggregation of hydrophobic groups of surfactant molecules
b) It has a high surface area to volume ratio
c) It has a spherical shape
d) It is a type of emulsifying agent
Answer: a) It is formed by the aggregation of hydrophobic groups of surfactant molecules
Which of the following is NOT a type of heterogeneous catalysis?
a) Acid-base catalysis
b) Enzyme catalysis
c) Metal catalysis
d) Surface catalysis
Answer: b) Enzyme catalysis
Which of the following is NOT a characteristic of a reversible adsorption process?
a) It occurs at low pressures
b) The amount of adsorbate increases with increasing pressure
c) The amount of adsorbate decreases with increasing temperature
d) The process is highly exothermic
Answer:d) The process is highly exothermic
Which of the following is NOT a type of emulsion?
a) Oil in water
b) Water in oil
c) Gas in water
d) Gas in oil
Answer:c) Gas in water
Which of the following is NOT a method for preparing colloidal solutions?
a) Bredig’s arc method
b) Peptization method
c) Dialysis method
d) Calorimetric method
