Work, Energy and Power
Motion of System of Particles and Rigid Body
Gravitation
Behaviour of Perfect Gas and Kinetic Theory
Current Electricity
Magnetic Effects of Current and Magnetism
Electromagnetic Induction and Alternating Currents
Electromagnetic Waves
Optics
Uncategorized
Physical World and Measurement
Kinematics
Vectors
Laws of Motion
Properties of Bulk Matter
Thermodynamics
Oscillations and Waves
Electrostatics
Dual Nature of Matter and Radiation
Atoms and Nuclei
Electronic Devices & Semiconductor
Communication System

Solutions
Electrochemistry
Chemical Kinetics
Surface Chemistry
General Principles and Processes of Isolation of Elements
Some Basic Concepts of Chemistry
Structure of Atom
Classification of Elements and Periodicity in Properties
Chemical Bonding and Molecular Structure
States of Matter: Gases and Liquids
Equilibrium
Redox Reactions
Hydrogen
s-Block Element (Alkali and Alkaline earth metals)
Some p-Block Elements
Organic Chemistry- Some Basic Principles and Techniques
Hydrocarbons
Environmental Chemistry
Solid State
p-Block Elements
d and f Block Elements
Coordination Compounds
Haloalkanes and Haloarenes
Alcohols, Phenols and Ethers
Aldehydes, Ketones and Carboxylic Acids
Organic Compounds Containing Nitrogen
Amines
Biomolecules
Polymers
Chemistry in Everyday Life
Thermodynamics
Uncategorized
Nuclear Chemistry

Coordinate Geometry
Mathematical Reasoning
Statistics and Probability
Vectors and Three-Dimensional Geometry
Uncategorized
Sets, Relations and Functions
Permutations and Combinations
Linear Programming
Matrices and Determinants
Logarithm, Indices, Surds and Partial Fraction
Correlation and Regression
Trigonometry
Principle of Mathematical Induction
Complex Numbers and Quadratic Equations
Linear Inequalities
Binomial Theorem
Sequence and Series
Conic Sections
Differential Calculus
Limit, Continuity and Differentiability
Integral Calculus
Differential Equations
Coordinate Geometry
Straight Lines

Surface Chemistry

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 1. The formation of micelles(Associated colloids) takes place

above {tex} \mathrm { CMC } {/tex} and at kraft temperature.

at {tex}\mathrm{CMC}{/tex} and above kraft temperature.

at {tex} \mathrm{CMC}{/tex} and at kraft temperature.

above {tex} \mathrm{CMC}{/tex} and above kraft temperature.

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 2. Which of the following is an example of positively charged sols?

{tex} \mathrm { As } _ { 2 } \mathrm { S } _ { 3 } {/tex}

Gold sol

Congo red sol

Haemoglobin

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 3. When a graph is plotted between {tex} \mathrm { x } / \mathrm { m } {/tex} versus pressure at constant temperature. The Freundlich equation at 'B' is (if {tex} n /> 1 ) {/tex}

{tex} \frac { x } { m } = k P ^ { \infty } {/tex}

{tex} \frac { x } { m } = k P ^ { \frac { 1 } { n } } {/tex}

{tex} \frac { x } { m } = k P ^ { 1 } {/tex}

{tex} \frac { x } { m } = k P ^ { n } {/tex}

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 4. Gelatin is added in manufacture of ice cream in order to

prevent formation of a colloid.

stabilise the colloid and prevent crystallisation.

cause the mixture to solidify easily.

improve flavour.

Gelatin absorbs free water in the ice cream and prevent the formation of large crystals.

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 5. Which of the following statement is incorrect?

Lyophilic sols are reversible.

Lyophilic sols are more stable than lyophobic sols.

Lyophobic sols require stabilising agent for their preservation.

Lyophobic sols can be formed by direct mixing of dispersed phase and dispersion medium.

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 6. Which of the following graph represents the variation of amount of chemisorptions of a gas by a solid with temperature under constant pressure?

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 7. The colloidal sols are purified by

Peptisation

Coagulation

Dialysis

None of these

Colloids are purified by dialysis. Dialysis is the process of removing a dissolved substance from the colloidal solution by means of diffusion through a suitable membrane (parchment membrane or animal membrane)

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 8. Which of the following is not heterogeneous?

Emulsion

True solution

Suspension

Colloidal solution

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 9. Cellulose dispersed in ethanol is called

emulsion

micelle

collodion

hydrophilic solution

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 10. According to the adsorption theory of catalysis, the speed of reaction increases because

adsorption lowers the activation energy of the reaction.

the concentration of reactant molecules at the active centres of the catalyst becomes high due to adsorption.

in the process of adsorption, the activation energy of the molecules becomes large.

adsorption produces heat which increases the speed of the reaction.

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 11. Which one of the following characteristics is not correct for physical adsorption?

Adsorption on solids is reversible.

Adsorption decreases with increase in temperature.

Adsorption is spontaneous.

Both enthalpy and entropy of adsorption are negative.

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 12. Identify the gas which is readily adsorbed by activated charcoal.

{tex} \mathrm { N } _ { 2 } {/tex}

{tex} \mathrm { SO } _ { 2 } {/tex}

{tex} \mathrm { H } _ { 2 } {/tex}

{tex} \mathrm { O } _ { 2 } {/tex}

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 13. The concentration of electrolyte required to coagulate a given amount of {tex} \mathrm { As } _ { 2 } \mathrm { S } _ { 3 } {/tex} sol is minimum in case of

{tex} \mathrm { K } _ { 2 } \mathrm { SO } _ { 4 } {/tex}

{tex} \mathrm { Al } \left( \mathrm { NO } _ { 3 } \right) _ { 3 } {/tex}

{tex} \operatorname { Mg } \left( \mathrm { NO } _ { 3 } \right) {/tex}

{tex} \mathrm { KNO } _ { 3 } {/tex}

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 14. Plot of {tex} \log x / m {/tex} against {tex} \log p {/tex} is a straight line inclined at an angle of {tex} 45 ^ { \circ } . {/tex} When the pressure is 4 atm and Freundlich parameter, {tex} k {/tex} is 10 , the amount of solute adsorbed per gram of adsorbent will be {tex} ( \log 5 = 0.6990 ) {/tex}

2{tex} g {/tex}

4{tex} g {/tex}

16{tex} g {/tex}

40{tex} g {/tex}

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 15. Which one of the following is an example for homogeneous catalysis?

Manufacture of sulphuric acid by contact process.

Manufacture of ammonia by Haber's process.

Hydrolysis of sucrose in presence of dilute hydrochloric acid.

Hydrogenation of oil.

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 16. The efficiency of enzyme catalysis is due to its capacity to

form a strong enzyme-substrate complex.

change the shape of the substrate.

lower the activation energy of the reaction.

form a colloidal solution in water.

The efficiency of enzyme catalysis is due to its capacity to lower the activation energy of the reaction.

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 17. Which of the following electrolytes is least effective in coagulating ferric hydroxide solution?

{tex} \mathrm { KNO } _ { 3 } {/tex}

{tex} \mathrm { K } _ { 2 } \mathrm { SO } _ { 4 } {/tex}

{tex} \mathrm { K } _ { 2 } \mathrm { Cr } _ { 2 } \mathrm { O } _ { 7 } {/tex}

{tex} \mathrm { K } _ { 4 } \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] {/tex}

**Correct Marks**
4

**Incorrectly Marks**
-1

Q 18. Example of intrinsic colloid is

glue

sulplur

{tex} \mathrm { Fe } {/tex}

{tex} \mathrm { As } _ { 2 } \mathrm { S } _ { 3 } {/tex}

Your request has been placed successfully.