Comprehension
The process of accumulation of molecular species at the surface of solid or liquid is called adsorption. It may be physisorption or chemisorption. Low temperature is favorable for physisorption. Amount of gas adsorbed by a solid depends upon nature of gas. Easily liquifiable gases are readily adsorbed. Catalyst increases the rate of reaction. Catalysis may be homogenous or heterogenous Enzymes are biological catalysts. They work at optimum pH and temperature. Solutions are of three types i.e. true solutions, colloids and suspensions. Depending on the interaction between dispersed phase and dispersion medium colloids may be Lyophilic and Lyophobic, Depending on type of particles there may multimolecular, macromolecular and associated colloids. Sol, gel, emulsions are also various types of colloids.
Question: 1
Physical adsorption may become chemisorption as
Physical adsorption may become chemisorption as
Updated On: Apr 26, 2024
- Surface area is increased
- Temperature is increased
- Activation energy is increased
- Amount of adsorbate is increased
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The Correct Option is B
Solution and Explanation
The correct option is (B): Temperature is increased
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Question: 2
An example of homogenous catalysis is:
An example of homogenous catalysis is:
Updated On: Apr 30, 2024
- \(2SO_2(g)\xrightarrow{Pt(s)}2SO_3(g)\)
- \(N_2(g)+3H_2(g)\xrightarrow{Fe(s)}2NH_3(g)\)
- \(4N_3(g)+5O_2(g)\xrightarrow{Pt(s)}4NO(g)+6H_2O(g)\)
- \(2SO_2(g)+O_2(g)\xrightarrow{NO(g)}2SO_3(g)\)
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The Correct Option is D
Solution and Explanation
The correct option is (D): \(2SO_2(g)+O_2(g)\xrightarrow{NO(g)}2SO_3(g)\)
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Question: 3
The characteristics of enzyme catalysis are:
A) Reactions are fastest at pH\(\rightarrow\)9-14
B) Human body temperature being 273K is best stuited
C) Enzyme are highly active in presence of activators
D) One enzyme can cataylse many reactions
E) Poisons interact with active functional groups on enzyme surface
Choose the correct answer from the options given below:
The characteristics of enzyme catalysis are:
A) Reactions are fastest at pH\(\rightarrow\)9-14
B) Human body temperature being 273K is best stuited
C) Enzyme are highly active in presence of activators
D) One enzyme can cataylse many reactions
E) Poisons interact with active functional groups on enzyme surface
Choose the correct answer from the options given below:
A) Reactions are fastest at pH\(\rightarrow\)9-14
B) Human body temperature being 273K is best stuited
C) Enzyme are highly active in presence of activators
D) One enzyme can cataylse many reactions
E) Poisons interact with active functional groups on enzyme surface
Choose the correct answer from the options given below:
Updated On: Apr 26, 2024
- C only
- C and E only
- A and B only
- D and E only
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The Correct Option is B
Solution and Explanation
The correct option is (B): C and E only
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Question: 4
Match List - I with List- II.
List - I List - II (A) Multimolecular colloid (I) Starch sol (B) Macromolecular colloid (II) Gold sol (C) Emulsion (III) Polythene (D) Lyophilic colloid (IV) Vanishing cream
Choose the correct answer from the options given below:
Match List - I with List- II.
Choose the correct answer from the options given below:
| List - I | List - II |
|---|---|
| (A) Multimolecular colloid | (I) Starch sol |
| (B) Macromolecular colloid | (II) Gold sol |
| (C) Emulsion | (III) Polythene |
| (D) Lyophilic colloid | (IV) Vanishing cream |
Choose the correct answer from the options given below:
Updated On: Apr 26, 2024
- A-I, B-II, C-IV, D-III
- А-ІІ, В-IIІ, C-IV, D-I
- А-II, В-II, C-I, D-IV
- A-III, B-II, C-I, D-IV
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The Correct Option is B
Solution and Explanation
The correct option is (B): А-ІІ, В-IIІ, C-IV, D-I
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Question: 5
The correct order of rate of adsorption of different gases by 1g activated charcoal is:
A) \(H_2 < CH_4 < SO_2\)
B) \(H_2 < SO_2 < CH_4\)
C) \(CH_4 < SO_2 < H_2\)
D) \(SO_2 < CH_4 < H_2\)
E) \(SO_2 < H_2 < CH_4\)
Choose the correct answer from the options given below:
The correct order of rate of adsorption of different gases by 1g activated charcoal is:
A) \(H_2 < CH_4 < SO_2\)
B) \(H_2 < SO_2 < CH_4\)
C) \(CH_4 < SO_2 < H_2\)
D) \(SO_2 < CH_4 < H_2\)
E) \(SO_2 < H_2 < CH_4\)
Choose the correct answer from the options given below:
A) \(H_2 < CH_4 < SO_2\)
B) \(H_2 < SO_2 < CH_4\)
C) \(CH_4 < SO_2 < H_2\)
D) \(SO_2 < CH_4 < H_2\)
E) \(SO_2 < H_2 < CH_4\)
Choose the correct answer from the options given below:
Updated On: Apr 26, 2024
- C only
- A only
- B only
- Both D and E
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The Correct Option is B
Solution and Explanation
The correct option is (B): A only
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