Curated PYQ Collection

Top 50 Most Repeated SURFACE CHEMISTRY PYQs | JEE MAINS

A curated collection of the most important questions from SURFACE CHEMISTRY, fully solved with step-by-step concepts to prepare for JEE MAINS.

Question #1

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Coagulation

Concept Applied

Tyndall effect scatters light, making the beam visible in colloids....

Read Full Step-by-Step Solution →

Question #2

Practice Question

A.Oil-in-Water (O/W)

B.Water-in-Oil (W/O)

C.Multiple Emulsion (W/O/W)

D.Solvent-in-Dispersant (S/D)

Concept Applied

Step 1: Identify the type of emulsion used in paint preparation. Step 2: Recall that oil-in-water (O/W) emulsions are commonly used in paint preparati...

Read Full Step-by-Step Solution →

Question #3

Practice Question

A.The sol‑gel method yields colloidal particles with a narrow size distribution and high stability due to electrostatic repulsion.

B.The sol‑gel method produces colloidal particles that are always larger than 1 µm and settle rapidly.

C.The sol‑gel method gives colloids that do not exhibit the Tyndall effect because the particles are too small.

D.The sol‑gel method results in colloids that are unstable unless a surfactant is added, because the surface charge is negligible.

Concept Applied

In the sol‑gel route, precursor molecules undergo hydrolysis and polycondensation, forming a network of nanometre‑sized particles. Their small size (1...

Read Full Step-by-Step Solution →

Question #4

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Dialysis

Concept Applied

Tyndall effect scatters light, making beam visible in colloids....

Read Full Step-by-Step Solution →

Question #5

Practice Question

A.$\frac{x}{m} = kP^{1/n}$

B.$\frac{x}{m} = kP^n$

C.$\frac{x}{m} = \frac{kP}{1+kP}$

D.$\frac{x}{m} = k\ln P$

Concept Applied

Freundlich isotherm: $\frac{x}{m} = kP^{1/n}$, where $k$, $n > 1$ are constants....

Read Full Step-by-Step Solution →

Question #6

Practice Question

A.Tyndall effect

B.Brownian motion

C.Electrophoresis

D.Dialysis

Concept Applied

The Tyndall effect is the scattering of light by colloidal particles....

Read Full Step-by-Step Solution →

Question #7

Practice Question

A.Reversible

B.Highly hydrated

C.Irreversible

D.Low viscosity

Concept Applied

Lyophobic sols are not easily reformed once precipitated....

Read Full Step-by-Step Solution →

Question #8

Practice Question

A.Reactants and catalyst in same phase

B.Involves adsorption

C.Occurs in liquid phase only

D.Catalyst forms intermediates

Concept Applied

Heterogeneous catalysis involves surface adsorption of reactants....

Read Full Step-by-Step Solution →

Question #9

Practice Question

A.Brownian motion only

B.Tyndall effect only

C.Both Brownian motion and Tyndall effect

D.Neither Brownian motion nor Tyndall effect

Concept Applied

The Tyndall effect (scattering of light by colloidal particles) is absent in true solutions but visible in colloids, making it a distinguishing featur...

Read Full Step-by-Step Solution →

Question #10

Practice Question

A.Critical micelle concentration

B.Solubility limit

C.Aggregation threshold

D.Phase separation point

Concept Applied

Micelles form above the critical micelle concentration (CMC) due to hydrophobic interactions....

Read Full Step-by-Step Solution →

Question #11

Practice Question

A.The solution shows Tyndall scattering of visible light and the particles undergo noticeable Brownian motion.

B.The solution is transparent to visible light and the particles settle rapidly under gravity.

C.The colloid exhibits a high electrical conductivity comparable to a true solution of ions.

D.The particles are larger than 1 µm and can be filtered by ordinary filter paper.

Concept Applied

Colloidal particles are 1–100 nm, which scatter light (Tyndall effect) and undergo Brownian motion. They do not settle quickly, have low conductivity,...

Read Full Step-by-Step Solution →

Question #12

Practice Question

A.Weak van der Waals forces

B.Formation of strong covalent bonds

C.High activation energy

D.Multilayer adsorption leading to chemisorption

Concept Applied

Physisorption involves physical adsorption through weak, non‑specific van der Waals interactions, occurs at low temperatures, and is reversible. Chemi...

Read Full Step-by-Step Solution →

Question #13

Practice Question

A.Micelles are formed above the critical micelle concentration

B.Micelles are formed below the critical micelle concentration

C.Micelles are formed at the critical micelle concentration

D.Micelles are formed at the surface of the solution

Concept Applied

Micelles are formed when the concentration of surfactant exceeds the critical micelle concentration...

Read Full Step-by-Step Solution →

Question #14

Practice Question

A.Bredig's arc method

B.Peptization

C.Reduction of AuCl₃ with SnCl₂

D.Dialysis

Concept Applied

Au sol is prepared by reducing AuCl₃ with SnCl₂....

Read Full Step-by-Step Solution →

Question #15

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Coagulation

Concept Applied

Tyndall effect scatters light, making the beam visible in colloids....

Read Full Step-by-Step Solution →

Question #16

Practice Question

A.Oil-in-Water (O/W)

B.Water-in-Oil (W/O)

C.Multiple Emulsion (W/O/W)

D.Solvent-in-Dispersant (S/D)

Concept Applied

Step 1: Identify the type of emulsion used in paint preparation. Step 2: Recall that oil-in-water (O/W) emulsions are commonly used in paint preparati...

Read Full Step-by-Step Solution →

Question #17

Practice Question

A.The sol‑gel method yields colloidal particles with a narrow size distribution and high stability due to electrostatic repulsion.

B.The sol‑gel method produces colloidal particles that are always larger than 1 µm and settle rapidly.

C.The sol‑gel method gives colloids that do not exhibit the Tyndall effect because the particles are too small.

D.The sol‑gel method results in colloids that are unstable unless a surfactant is added, because the surface charge is negligible.

Concept Applied

In the sol‑gel route, precursor molecules undergo hydrolysis and polycondensation, forming a network of nanometre‑sized particles. Their small size (1...

Read Full Step-by-Step Solution →

Question #18

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Dialysis

Concept Applied

Tyndall effect scatters light, making beam visible in colloids....

Read Full Step-by-Step Solution →

Question #19

Practice Question

A.$\frac{x}{m} = kP^{1/n}$

B.$\frac{x}{m} = kP^n$

C.$\frac{x}{m} = \frac{kP}{1+kP}$

D.$\frac{x}{m} = k\ln P$

Concept Applied

Freundlich isotherm: $\frac{x}{m} = kP^{1/n}$, where $k$, $n > 1$ are constants....

Read Full Step-by-Step Solution →

Question #20

Practice Question

A.Tyndall effect

B.Brownian motion

C.Electrophoresis

D.Dialysis

Concept Applied

The Tyndall effect is the scattering of light by colloidal particles....

Read Full Step-by-Step Solution →

Question #21

Practice Question

A.Reversible

B.Highly hydrated

C.Irreversible

D.Low viscosity

Concept Applied

Lyophobic sols are not easily reformed once precipitated....

Read Full Step-by-Step Solution →

Question #22

Practice Question

A.Reactants and catalyst in same phase

B.Involves adsorption

C.Occurs in liquid phase only

D.Catalyst forms intermediates

Concept Applied

Heterogeneous catalysis involves surface adsorption of reactants....

Read Full Step-by-Step Solution →

Question #23

Practice Question

A.Brownian motion only

B.Tyndall effect only

C.Both Brownian motion and Tyndall effect

D.Neither Brownian motion nor Tyndall effect

Concept Applied

The Tyndall effect (scattering of light by colloidal particles) is absent in true solutions but visible in colloids, making it a distinguishing featur...

Read Full Step-by-Step Solution →

Question #24

Practice Question

A.Critical micelle concentration

B.Solubility limit

C.Aggregation threshold

D.Phase separation point

Concept Applied

Micelles form above the critical micelle concentration (CMC) due to hydrophobic interactions....

Read Full Step-by-Step Solution →

Question #25

Practice Question

A.The solution shows Tyndall scattering of visible light and the particles undergo noticeable Brownian motion.

B.The solution is transparent to visible light and the particles settle rapidly under gravity.

C.The colloid exhibits a high electrical conductivity comparable to a true solution of ions.

D.The particles are larger than 1 µm and can be filtered by ordinary filter paper.

Concept Applied

Colloidal particles are 1–100 nm, which scatter light (Tyndall effect) and undergo Brownian motion. They do not settle quickly, have low conductivity,...

Read Full Step-by-Step Solution →

Question #26

Practice Question

A.Weak van der Waals forces

B.Formation of strong covalent bonds

C.High activation energy

D.Multilayer adsorption leading to chemisorption

Concept Applied

Physisorption involves physical adsorption through weak, non‑specific van der Waals interactions, occurs at low temperatures, and is reversible. Chemi...

Read Full Step-by-Step Solution →

Question #27

Practice Question

A.Micelles are formed above the critical micelle concentration

B.Micelles are formed below the critical micelle concentration

C.Micelles are formed at the critical micelle concentration

D.Micelles are formed at the surface of the solution

Concept Applied

Micelles are formed when the concentration of surfactant exceeds the critical micelle concentration...

Read Full Step-by-Step Solution →

Question #28

Practice Question

A.Bredig's arc method

B.Peptization

C.Reduction of AuCl₃ with SnCl₂

D.Dialysis

Concept Applied

Au sol is prepared by reducing AuCl₃ with SnCl₂....

Read Full Step-by-Step Solution →

Question #29

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Coagulation

Concept Applied

Tyndall effect scatters light, making the beam visible in colloids....

Read Full Step-by-Step Solution →

Question #30

Practice Question

A.Oil-in-Water (O/W)

B.Water-in-Oil (W/O)

C.Multiple Emulsion (W/O/W)

D.Solvent-in-Dispersant (S/D)

Concept Applied

Step 1: Identify the type of emulsion used in paint preparation. Step 2: Recall that oil-in-water (O/W) emulsions are commonly used in paint preparati...

Read Full Step-by-Step Solution →

Question #31

Practice Question

A.The sol‑gel method yields colloidal particles with a narrow size distribution and high stability due to electrostatic repulsion.

B.The sol‑gel method produces colloidal particles that are always larger than 1 µm and settle rapidly.

C.The sol‑gel method gives colloids that do not exhibit the Tyndall effect because the particles are too small.

D.The sol‑gel method results in colloids that are unstable unless a surfactant is added, because the surface charge is negligible.

Concept Applied

In the sol‑gel route, precursor molecules undergo hydrolysis and polycondensation, forming a network of nanometre‑sized particles. Their small size (1...

Read Full Step-by-Step Solution →

Question #32

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Dialysis

Concept Applied

Tyndall effect scatters light, making beam visible in colloids....

Read Full Step-by-Step Solution →

Question #33

Practice Question

A.$\frac{x}{m} = kP^{1/n}$

B.$\frac{x}{m} = kP^n$

C.$\frac{x}{m} = \frac{kP}{1+kP}$

D.$\frac{x}{m} = k\ln P$

Concept Applied

Freundlich isotherm: $\frac{x}{m} = kP^{1/n}$, where $k$, $n > 1$ are constants....

Read Full Step-by-Step Solution →

Question #34

Practice Question

A.Tyndall effect

B.Brownian motion

C.Electrophoresis

D.Dialysis

Concept Applied

The Tyndall effect is the scattering of light by colloidal particles....

Read Full Step-by-Step Solution →

Question #35

Practice Question

A.Reversible

B.Highly hydrated

C.Irreversible

D.Low viscosity

Concept Applied

Lyophobic sols are not easily reformed once precipitated....

Read Full Step-by-Step Solution →

Question #36

Practice Question

A.Reactants and catalyst in same phase

B.Involves adsorption

C.Occurs in liquid phase only

D.Catalyst forms intermediates

Concept Applied

Heterogeneous catalysis involves surface adsorption of reactants....

Read Full Step-by-Step Solution →

Question #37

Practice Question

A.Brownian motion only

B.Tyndall effect only

C.Both Brownian motion and Tyndall effect

D.Neither Brownian motion nor Tyndall effect

Concept Applied

The Tyndall effect (scattering of light by colloidal particles) is absent in true solutions but visible in colloids, making it a distinguishing featur...

Read Full Step-by-Step Solution →

Question #38

Practice Question

A.Critical micelle concentration

B.Solubility limit

C.Aggregation threshold

D.Phase separation point

Concept Applied

Micelles form above the critical micelle concentration (CMC) due to hydrophobic interactions....

Read Full Step-by-Step Solution →

Question #39

Practice Question

A.The solution shows Tyndall scattering of visible light and the particles undergo noticeable Brownian motion.

B.The solution is transparent to visible light and the particles settle rapidly under gravity.

C.The colloid exhibits a high electrical conductivity comparable to a true solution of ions.

D.The particles are larger than 1 µm and can be filtered by ordinary filter paper.

Concept Applied

Colloidal particles are 1–100 nm, which scatter light (Tyndall effect) and undergo Brownian motion. They do not settle quickly, have low conductivity,...

Read Full Step-by-Step Solution →

Question #40

Practice Question

A.Weak van der Waals forces

B.Formation of strong covalent bonds

C.High activation energy

D.Multilayer adsorption leading to chemisorption

Concept Applied

Physisorption involves physical adsorption through weak, non‑specific van der Waals interactions, occurs at low temperatures, and is reversible. Chemi...

Read Full Step-by-Step Solution →

Question #41

Practice Question

A.Micelles are formed above the critical micelle concentration

B.Micelles are formed below the critical micelle concentration

C.Micelles are formed at the critical micelle concentration

D.Micelles are formed at the surface of the solution

Concept Applied

Micelles are formed when the concentration of surfactant exceeds the critical micelle concentration...

Read Full Step-by-Step Solution →

Question #42

Practice Question

A.Bredig's arc method

B.Peptization

C.Reduction of AuCl₃ with SnCl₂

D.Dialysis

Concept Applied

Au sol is prepared by reducing AuCl₃ with SnCl₂....

Read Full Step-by-Step Solution →

Question #43

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Coagulation

Concept Applied

Tyndall effect scatters light, making the beam visible in colloids....

Read Full Step-by-Step Solution →

Question #44

Practice Question

A.Oil-in-Water (O/W)

B.Water-in-Oil (W/O)

C.Multiple Emulsion (W/O/W)

D.Solvent-in-Dispersant (S/D)

Concept Applied

Step 1: Identify the type of emulsion used in paint preparation. Step 2: Recall that oil-in-water (O/W) emulsions are commonly used in paint preparati...

Read Full Step-by-Step Solution →

Question #45

Practice Question

A.The sol‑gel method yields colloidal particles with a narrow size distribution and high stability due to electrostatic repulsion.

B.The sol‑gel method produces colloidal particles that are always larger than 1 µm and settle rapidly.

C.The sol‑gel method gives colloids that do not exhibit the Tyndall effect because the particles are too small.

D.The sol‑gel method results in colloids that are unstable unless a surfactant is added, because the surface charge is negligible.

Concept Applied

In the sol‑gel route, precursor molecules undergo hydrolysis and polycondensation, forming a network of nanometre‑sized particles. Their small size (1...

Read Full Step-by-Step Solution →

Question #46

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Dialysis

Concept Applied

Tyndall effect scatters light, making beam visible in colloids....

Read Full Step-by-Step Solution →

Question #47

Practice Question

A.$\frac{x}{m} = kP^{1/n}$

B.$\frac{x}{m} = kP^n$

C.$\frac{x}{m} = \frac{kP}{1+kP}$

D.$\frac{x}{m} = k\ln P$

Concept Applied

Freundlich isotherm: $\frac{x}{m} = kP^{1/n}$, where $k$, $n > 1$ are constants....

Read Full Step-by-Step Solution →

Question #48

Practice Question

A.Tyndall effect

B.Brownian motion

C.Electrophoresis

D.Dialysis

Concept Applied

The Tyndall effect is the scattering of light by colloidal particles....

Read Full Step-by-Step Solution →

Question #49

Practice Question

A.Reversible

B.Highly hydrated

C.Irreversible

D.Low viscosity

Concept Applied

Lyophobic sols are not easily reformed once precipitated....

Read Full Step-by-Step Solution →

Question #50

Practice Question

A.Reactants and catalyst in same phase

B.Involves adsorption

C.Occurs in liquid phase only

D.Catalyst forms intermediates

Concept Applied

Heterogeneous catalysis involves surface adsorption of reactants....

Read Full Step-by-Step Solution →

Curated PYQ Collection

Top 50 Most Repeated SURFACE CHEMISTRY PYQs | JEE MAINS

A curated collection of the most important questions from SURFACE CHEMISTRY, fully solved with step-by-step concepts to prepare for JEE MAINS.

Question #1

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Coagulation

Concept Applied

Tyndall effect scatters light, making the beam visible in colloids....

Read Full Step-by-Step Solution →

Question #2

Practice Question

A.Oil-in-Water (O/W)

B.Water-in-Oil (W/O)

C.Multiple Emulsion (W/O/W)

D.Solvent-in-Dispersant (S/D)

Concept Applied

Step 1: Identify the type of emulsion used in paint preparation. Step 2: Recall that oil-in-water (O/W) emulsions are commonly used in paint preparati...

Read Full Step-by-Step Solution →

Question #3

Practice Question

A.The sol‑gel method yields colloidal particles with a narrow size distribution and high stability due to electrostatic repulsion.

B.The sol‑gel method produces colloidal particles that are always larger than 1 µm and settle rapidly.

C.The sol‑gel method gives colloids that do not exhibit the Tyndall effect because the particles are too small.

D.The sol‑gel method results in colloids that are unstable unless a surfactant is added, because the surface charge is negligible.

Concept Applied

In the sol‑gel route, precursor molecules undergo hydrolysis and polycondensation, forming a network of nanometre‑sized particles. Their small size (1...

Read Full Step-by-Step Solution →

Question #4

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Dialysis

Concept Applied

Tyndall effect scatters light, making beam visible in colloids....

Read Full Step-by-Step Solution →

Question #5

Practice Question

A.$\frac{x}{m} = kP^{1/n}$

B.$\frac{x}{m} = kP^n$

C.$\frac{x}{m} = \frac{kP}{1+kP}$

D.$\frac{x}{m} = k\ln P$

Concept Applied

Freundlich isotherm: $\frac{x}{m} = kP^{1/n}$, where $k$, $n > 1$ are constants....

Read Full Step-by-Step Solution →

Question #6

Practice Question

A.Tyndall effect

B.Brownian motion

C.Electrophoresis

D.Dialysis

Concept Applied

The Tyndall effect is the scattering of light by colloidal particles....

Read Full Step-by-Step Solution →

Question #7

Practice Question

A.Reversible

B.Highly hydrated

C.Irreversible

D.Low viscosity

Concept Applied

Lyophobic sols are not easily reformed once precipitated....

Read Full Step-by-Step Solution →

Question #8

Practice Question

A.Reactants and catalyst in same phase

B.Involves adsorption

C.Occurs in liquid phase only

D.Catalyst forms intermediates

Concept Applied

Heterogeneous catalysis involves surface adsorption of reactants....

Read Full Step-by-Step Solution →

Question #9

Practice Question

A.Brownian motion only

B.Tyndall effect only

C.Both Brownian motion and Tyndall effect

D.Neither Brownian motion nor Tyndall effect

Concept Applied

The Tyndall effect (scattering of light by colloidal particles) is absent in true solutions but visible in colloids, making it a distinguishing featur...

Read Full Step-by-Step Solution →

Question #10

Practice Question

A.Critical micelle concentration

B.Solubility limit

C.Aggregation threshold

D.Phase separation point

Concept Applied

Micelles form above the critical micelle concentration (CMC) due to hydrophobic interactions....

Read Full Step-by-Step Solution →

Question #11

Practice Question

A.The solution shows Tyndall scattering of visible light and the particles undergo noticeable Brownian motion.

B.The solution is transparent to visible light and the particles settle rapidly under gravity.

C.The colloid exhibits a high electrical conductivity comparable to a true solution of ions.

D.The particles are larger than 1 µm and can be filtered by ordinary filter paper.

Concept Applied

Colloidal particles are 1–100 nm, which scatter light (Tyndall effect) and undergo Brownian motion. They do not settle quickly, have low conductivity,...

Read Full Step-by-Step Solution →

Question #12

Practice Question

A.Weak van der Waals forces

B.Formation of strong covalent bonds

C.High activation energy

D.Multilayer adsorption leading to chemisorption

Concept Applied

Physisorption involves physical adsorption through weak, non‑specific van der Waals interactions, occurs at low temperatures, and is reversible. Chemi...

Read Full Step-by-Step Solution →

Question #13

Practice Question

A.Micelles are formed above the critical micelle concentration

B.Micelles are formed below the critical micelle concentration

C.Micelles are formed at the critical micelle concentration

D.Micelles are formed at the surface of the solution

Concept Applied

Micelles are formed when the concentration of surfactant exceeds the critical micelle concentration...

Read Full Step-by-Step Solution →

Question #14

Practice Question

A.Bredig's arc method

B.Peptization

C.Reduction of AuCl₃ with SnCl₂

D.Dialysis

Concept Applied

Au sol is prepared by reducing AuCl₃ with SnCl₂....

Read Full Step-by-Step Solution →

Question #15

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Coagulation

Concept Applied

Tyndall effect scatters light, making the beam visible in colloids....

Read Full Step-by-Step Solution →

Question #16

Practice Question

A.Oil-in-Water (O/W)

B.Water-in-Oil (W/O)

C.Multiple Emulsion (W/O/W)

D.Solvent-in-Dispersant (S/D)

Concept Applied

Step 1: Identify the type of emulsion used in paint preparation. Step 2: Recall that oil-in-water (O/W) emulsions are commonly used in paint preparati...

Read Full Step-by-Step Solution →

Question #17

Practice Question

A.The sol‑gel method yields colloidal particles with a narrow size distribution and high stability due to electrostatic repulsion.

B.The sol‑gel method produces colloidal particles that are always larger than 1 µm and settle rapidly.

C.The sol‑gel method gives colloids that do not exhibit the Tyndall effect because the particles are too small.

D.The sol‑gel method results in colloids that are unstable unless a surfactant is added, because the surface charge is negligible.

Concept Applied

In the sol‑gel route, precursor molecules undergo hydrolysis and polycondensation, forming a network of nanometre‑sized particles. Their small size (1...

Read Full Step-by-Step Solution →

Question #18

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Dialysis

Concept Applied

Tyndall effect scatters light, making beam visible in colloids....

Read Full Step-by-Step Solution →

Question #19

Practice Question

A.$\frac{x}{m} = kP^{1/n}$

B.$\frac{x}{m} = kP^n$

C.$\frac{x}{m} = \frac{kP}{1+kP}$

D.$\frac{x}{m} = k\ln P$

Concept Applied

Freundlich isotherm: $\frac{x}{m} = kP^{1/n}$, where $k$, $n > 1$ are constants....

Read Full Step-by-Step Solution →

Question #20

Practice Question

A.Tyndall effect

B.Brownian motion

C.Electrophoresis

D.Dialysis

Concept Applied

The Tyndall effect is the scattering of light by colloidal particles....

Read Full Step-by-Step Solution →

Question #21

Practice Question

A.Reversible

B.Highly hydrated

C.Irreversible

D.Low viscosity

Concept Applied

Lyophobic sols are not easily reformed once precipitated....

Read Full Step-by-Step Solution →

Question #22

Practice Question

A.Reactants and catalyst in same phase

B.Involves adsorption

C.Occurs in liquid phase only

D.Catalyst forms intermediates

Concept Applied

Heterogeneous catalysis involves surface adsorption of reactants....

Read Full Step-by-Step Solution →

Question #23

Practice Question

A.Brownian motion only

B.Tyndall effect only

C.Both Brownian motion and Tyndall effect

D.Neither Brownian motion nor Tyndall effect

Concept Applied

The Tyndall effect (scattering of light by colloidal particles) is absent in true solutions but visible in colloids, making it a distinguishing featur...

Read Full Step-by-Step Solution →

Question #24

Practice Question

A.Critical micelle concentration

B.Solubility limit

C.Aggregation threshold

D.Phase separation point

Concept Applied

Micelles form above the critical micelle concentration (CMC) due to hydrophobic interactions....

Read Full Step-by-Step Solution →

Question #25

Practice Question

A.The solution shows Tyndall scattering of visible light and the particles undergo noticeable Brownian motion.

B.The solution is transparent to visible light and the particles settle rapidly under gravity.

C.The colloid exhibits a high electrical conductivity comparable to a true solution of ions.

D.The particles are larger than 1 µm and can be filtered by ordinary filter paper.

Concept Applied

Colloidal particles are 1–100 nm, which scatter light (Tyndall effect) and undergo Brownian motion. They do not settle quickly, have low conductivity,...

Read Full Step-by-Step Solution →

Question #26

Practice Question

A.Weak van der Waals forces

B.Formation of strong covalent bonds

C.High activation energy

D.Multilayer adsorption leading to chemisorption

Concept Applied

Physisorption involves physical adsorption through weak, non‑specific van der Waals interactions, occurs at low temperatures, and is reversible. Chemi...

Read Full Step-by-Step Solution →

Question #27

Practice Question

A.Micelles are formed above the critical micelle concentration

B.Micelles are formed below the critical micelle concentration

C.Micelles are formed at the critical micelle concentration

D.Micelles are formed at the surface of the solution

Concept Applied

Micelles are formed when the concentration of surfactant exceeds the critical micelle concentration...

Read Full Step-by-Step Solution →

Question #28

Practice Question

A.Bredig's arc method

B.Peptization

C.Reduction of AuCl₃ with SnCl₂

D.Dialysis

Concept Applied

Au sol is prepared by reducing AuCl₃ with SnCl₂....

Read Full Step-by-Step Solution →

Question #29

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Coagulation

Concept Applied

Tyndall effect scatters light, making the beam visible in colloids....

Read Full Step-by-Step Solution →

Question #30

Practice Question

A.Oil-in-Water (O/W)

B.Water-in-Oil (W/O)

C.Multiple Emulsion (W/O/W)

D.Solvent-in-Dispersant (S/D)

Concept Applied

Step 1: Identify the type of emulsion used in paint preparation. Step 2: Recall that oil-in-water (O/W) emulsions are commonly used in paint preparati...

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Question #31

Practice Question

A.The sol‑gel method yields colloidal particles with a narrow size distribution and high stability due to electrostatic repulsion.

B.The sol‑gel method produces colloidal particles that are always larger than 1 µm and settle rapidly.

C.The sol‑gel method gives colloids that do not exhibit the Tyndall effect because the particles are too small.

D.The sol‑gel method results in colloids that are unstable unless a surfactant is added, because the surface charge is negligible.

Concept Applied

In the sol‑gel route, precursor molecules undergo hydrolysis and polycondensation, forming a network of nanometre‑sized particles. Their small size (1...

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Question #32

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Dialysis

Concept Applied

Tyndall effect scatters light, making beam visible in colloids....

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Question #33

Practice Question

A.$\frac{x}{m} = kP^{1/n}$

B.$\frac{x}{m} = kP^n$

C.$\frac{x}{m} = \frac{kP}{1+kP}$

D.$\frac{x}{m} = k\ln P$

Concept Applied

Freundlich isotherm: $\frac{x}{m} = kP^{1/n}$, where $k$, $n > 1$ are constants....

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Question #34

Practice Question

A.Tyndall effect

B.Brownian motion

C.Electrophoresis

D.Dialysis

Concept Applied

The Tyndall effect is the scattering of light by colloidal particles....

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Question #35

Practice Question

A.Reversible

B.Highly hydrated

C.Irreversible

D.Low viscosity

Concept Applied

Lyophobic sols are not easily reformed once precipitated....

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Question #36

Practice Question

A.Reactants and catalyst in same phase

B.Involves adsorption

C.Occurs in liquid phase only

D.Catalyst forms intermediates

Concept Applied

Heterogeneous catalysis involves surface adsorption of reactants....

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Question #37

Practice Question

A.Brownian motion only

B.Tyndall effect only

C.Both Brownian motion and Tyndall effect

D.Neither Brownian motion nor Tyndall effect

Concept Applied

The Tyndall effect (scattering of light by colloidal particles) is absent in true solutions but visible in colloids, making it a distinguishing featur...

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Question #38

Practice Question

A.Critical micelle concentration

B.Solubility limit

C.Aggregation threshold

D.Phase separation point

Concept Applied

Micelles form above the critical micelle concentration (CMC) due to hydrophobic interactions....

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Question #39

Practice Question

A.The solution shows Tyndall scattering of visible light and the particles undergo noticeable Brownian motion.

B.The solution is transparent to visible light and the particles settle rapidly under gravity.

C.The colloid exhibits a high electrical conductivity comparable to a true solution of ions.

D.The particles are larger than 1 µm and can be filtered by ordinary filter paper.

Concept Applied

Colloidal particles are 1–100 nm, which scatter light (Tyndall effect) and undergo Brownian motion. They do not settle quickly, have low conductivity,...

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Question #40

Practice Question

A.Weak van der Waals forces

B.Formation of strong covalent bonds

C.High activation energy

D.Multilayer adsorption leading to chemisorption

Concept Applied

Physisorption involves physical adsorption through weak, non‑specific van der Waals interactions, occurs at low temperatures, and is reversible. Chemi...

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Question #41

Practice Question

A.Micelles are formed above the critical micelle concentration

B.Micelles are formed below the critical micelle concentration

C.Micelles are formed at the critical micelle concentration

D.Micelles are formed at the surface of the solution

Concept Applied

Micelles are formed when the concentration of surfactant exceeds the critical micelle concentration...

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Question #42

Practice Question

A.Bredig's arc method

B.Peptization

C.Reduction of AuCl₃ with SnCl₂

D.Dialysis

Concept Applied

Au sol is prepared by reducing AuCl₃ with SnCl₂....

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Question #43

Practice Question

A.Brownian motion

B.Tyndall effect

C.Electrophoresis

D.Coagulation

Concept Applied

Tyndall effect scatters light, making the beam visible in colloids....

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Question #44

Practice Question

A.Oil-in-Water (O/W)

B.Water-in-Oil (W/O)

C.Multiple Emulsion (W/O/W)

D.Solvent-in-Dispersant (S/D)

Concept Applied

Step 1: Identify the type of emulsion used in paint preparation. Step 2: Recall that oil-in-water (O/W) emulsions are commonly used in paint preparati...

Read Full Step-by-Step Solution →

Question #45

Practice Question

A.The sol‑gel method yields colloidal particles with a narrow size distribution and high stability due to electrostatic repulsion.

B.The sol‑gel method produces colloidal particles that are always larger than 1 µm and settle rapidly.

C.The sol‑gel method gives colloids that do not exhibit the Tyndall effect because the particles are too small.

D.The sol‑gel method results in colloids that are unstable unless a surfactant is added, because the surface charge is negligible.

Concept Applied

In the sol‑gel route, precursor molecules undergo hydrolysis and polycondensation, forming a network of nanometre‑sized particles. Their small size (1...

Read Full Step-by-Step Solution →