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Page 1
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
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Surface Chemistry
1. Which are not purely surely surface phenomena?
(a) Adsorption, surface tension (b) Surface tension, viscosity
(c) Absorption, viscosity (d) Absorption, viscosity
2. Absorbed acetic acid on activated carbon is:
(a) Adsorber (b) Absorber (c) Adsorbent (d) Adsorbate
3. Adsorption due to strong chemical forces is called:
(a) Chemisorption (b) Physisorption (c) Both (a) and (b) (d) None of these
4. Adsorption of gases on solid surface is exothermic because:
(a) Free energy increases (b) Entropy decreases
(c) Entropy increases
(d) Interaction developed between gas and solid particles
5. The nature of bonding forces in adsorption are:
(a) Purely physical such as vander Waal’s forces (b) Purely chemical
(c) Both chemical and physical are possible (d) None of these
6. Which one of the following is not applicable to chemisorption?
(a) Heat of adsorption is negative (b) It takes places at high temperature
(c) It is reversible (d) It forms mono-molecular layer
7. Which one of the following characteristics is correct for physical adsorption?
(a) It is very specific
(b) Adsorption on solids is irreversible
(c) Adsorption decreases with decrease in temperature
(d) Generally both enthalpy and entropy of adsorption are negative
8. Which of the following statement is not correct?
(a) Physical of the following statement is not correct?
(b) Physical adsorption is irreversible
(c) Chemical adsorption increases with increases in temperature upto certain limit than decrease
(d) Enthalpy of adsorption (|?H|) for a chemical adsorption is greater than that of physical
Adsorption
9. Which gas will be adsorbed on a solid to greater extent?
Page 2
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
Mob.011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com
Surface Chemistry
1. Which are not purely surely surface phenomena?
(a) Adsorption, surface tension (b) Surface tension, viscosity
(c) Absorption, viscosity (d) Absorption, viscosity
2. Absorbed acetic acid on activated carbon is:
(a) Adsorber (b) Absorber (c) Adsorbent (d) Adsorbate
3. Adsorption due to strong chemical forces is called:
(a) Chemisorption (b) Physisorption (c) Both (a) and (b) (d) None of these
4. Adsorption of gases on solid surface is exothermic because:
(a) Free energy increases (b) Entropy decreases
(c) Entropy increases
(d) Interaction developed between gas and solid particles
5. The nature of bonding forces in adsorption are:
(a) Purely physical such as vander Waal’s forces (b) Purely chemical
(c) Both chemical and physical are possible (d) None of these
6. Which one of the following is not applicable to chemisorption?
(a) Heat of adsorption is negative (b) It takes places at high temperature
(c) It is reversible (d) It forms mono-molecular layer
7. Which one of the following characteristics is correct for physical adsorption?
(a) It is very specific
(b) Adsorption on solids is irreversible
(c) Adsorption decreases with decrease in temperature
(d) Generally both enthalpy and entropy of adsorption are negative
8. Which of the following statement is not correct?
(a) Physical of the following statement is not correct?
(b) Physical adsorption is irreversible
(c) Chemical adsorption increases with increases in temperature upto certain limit than decrease
(d) Enthalpy of adsorption (|?H|) for a chemical adsorption is greater than that of physical
Adsorption
9. Which gas will be adsorbed on a solid to greater extent?
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
Mob.011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com
(a) Having non-polar molecule (b) Having highest critical temperature
(c) Having lowest critical temperature (d) Having lowest critical pressure
10. Which of the following factors affects the adsorption of a gas on solid?
(a) Critical temperature (T c) (b) Temperature of gas
(c) Pressure of gas (d) All of these
11. Absorption and adsorptions are respectively:
(a) Surface phenomena, bulk phenomena (b) Bulk phenomena, surface phenomena
(c) Both are bulk phenomena (d) Both are surface phenomena
12. Adsorption is multilayer in case of:
(a) Physical adsorption (b) Chemisorption
(c) Both (a) and (b) (d) None of these
13. Reversible adsorption is:
(a) Chemical adsorption (b) Physical adsorption
(c) Both (a) and (b) (d) None of these
14. The effect of pressure on adsorption is high if:
(a) Temperature is low (b) Temperature is high
(c) Temperature is very high (d) larger charcoal piece is taken
15. Sorption is the phenomenon:
(a) Reverse of adsorption
(b)Reverseofabsorbption
(c) when adsorption and absorption takes place simultaneously
(d) None of these
16. Which of the following adsorption isotherms represents the adsorption of a gas by solid involving
multilayers of formation? (P s = saturation pressure)
(a) (b) (c) (d)
17. A plot of log
x
M
??
??
??
against log P for the adsorption of a gas on a solid given a straight line with
slope equal to:
Page 3
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
Mob.011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com
Surface Chemistry
1. Which are not purely surely surface phenomena?
(a) Adsorption, surface tension (b) Surface tension, viscosity
(c) Absorption, viscosity (d) Absorption, viscosity
2. Absorbed acetic acid on activated carbon is:
(a) Adsorber (b) Absorber (c) Adsorbent (d) Adsorbate
3. Adsorption due to strong chemical forces is called:
(a) Chemisorption (b) Physisorption (c) Both (a) and (b) (d) None of these
4. Adsorption of gases on solid surface is exothermic because:
(a) Free energy increases (b) Entropy decreases
(c) Entropy increases
(d) Interaction developed between gas and solid particles
5. The nature of bonding forces in adsorption are:
(a) Purely physical such as vander Waal’s forces (b) Purely chemical
(c) Both chemical and physical are possible (d) None of these
6. Which one of the following is not applicable to chemisorption?
(a) Heat of adsorption is negative (b) It takes places at high temperature
(c) It is reversible (d) It forms mono-molecular layer
7. Which one of the following characteristics is correct for physical adsorption?
(a) It is very specific
(b) Adsorption on solids is irreversible
(c) Adsorption decreases with decrease in temperature
(d) Generally both enthalpy and entropy of adsorption are negative
8. Which of the following statement is not correct?
(a) Physical of the following statement is not correct?
(b) Physical adsorption is irreversible
(c) Chemical adsorption increases with increases in temperature upto certain limit than decrease
(d) Enthalpy of adsorption (|?H|) for a chemical adsorption is greater than that of physical
Adsorption
9. Which gas will be adsorbed on a solid to greater extent?
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
Mob.011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com
(a) Having non-polar molecule (b) Having highest critical temperature
(c) Having lowest critical temperature (d) Having lowest critical pressure
10. Which of the following factors affects the adsorption of a gas on solid?
(a) Critical temperature (T c) (b) Temperature of gas
(c) Pressure of gas (d) All of these
11. Absorption and adsorptions are respectively:
(a) Surface phenomena, bulk phenomena (b) Bulk phenomena, surface phenomena
(c) Both are bulk phenomena (d) Both are surface phenomena
12. Adsorption is multilayer in case of:
(a) Physical adsorption (b) Chemisorption
(c) Both (a) and (b) (d) None of these
13. Reversible adsorption is:
(a) Chemical adsorption (b) Physical adsorption
(c) Both (a) and (b) (d) None of these
14. The effect of pressure on adsorption is high if:
(a) Temperature is low (b) Temperature is high
(c) Temperature is very high (d) larger charcoal piece is taken
15. Sorption is the phenomenon:
(a) Reverse of adsorption
(b)Reverseofabsorbption
(c) when adsorption and absorption takes place simultaneously
(d) None of these
16. Which of the following adsorption isotherms represents the adsorption of a gas by solid involving
multilayers of formation? (P s = saturation pressure)
(a) (b) (c) (d)
17. A plot of log
x
M
??
??
??
against log P for the adsorption of a gas on a solid given a straight line with
slope equal to:
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
Mob.011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com
(a)
1
n
(b) n (c) log K (d) K
18. According to the adsorption theory of catalysis, the speed of the reaction increases because:
(a) In the process of adsorption, the activation energy of the molecules becomes large
(b) Adsorption produces heat which increase the speed of the reaction
(c) Adsorption lowers the activation energy of the reaction
(d) Adsorption increases the activation energy of the reaction
19. Which among the following statements is false?
(a) Increase of pressure increases the amount adsorption
(b) Increase of temperature may decrease the amount of adsorption
(c) Adsorption may be monolayered or multilayered
(d) Particle size of the absorbent will not affect the amount of adsorption
20. Select incorrect statement:
(a) Lyophilic sols are reversible
(b) Lyophilic sols are self stabilized
(c) Lyophobic sols are obtained from inorganic materials
(d) Lyophobic sols particles are hydrated
21. Which of the following is true in respect of chemical adsorption?
(a) ?H < 0, ?S > 0, ?G > 0 (b) ?H < 0, ?S < 0, ?G < 0
(c) ?H > 0, ?S > 0, ?G < 0 (d) ?H > 0, ?S < 0, ?G > 0
22. For the graph below, select correct order of temperature?
(a) T 1 > T 2 > T 3 (b) T 2 > T 3 > T 1 (c) T 3 > T 2 > T 1 (d) T 1 = T 2 = T 3
23. Although, nitrogen does not absorb on a surface at room temperature, it adsorbs on the surface at
83 K. Which one of the following statements is correct?
(a) At 83 K, there is formation of monolayer
(b) At 83 K, nitrogen is absorbed as atoms
Page 4
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
Mob.011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com
Surface Chemistry
1. Which are not purely surely surface phenomena?
(a) Adsorption, surface tension (b) Surface tension, viscosity
(c) Absorption, viscosity (d) Absorption, viscosity
2. Absorbed acetic acid on activated carbon is:
(a) Adsorber (b) Absorber (c) Adsorbent (d) Adsorbate
3. Adsorption due to strong chemical forces is called:
(a) Chemisorption (b) Physisorption (c) Both (a) and (b) (d) None of these
4. Adsorption of gases on solid surface is exothermic because:
(a) Free energy increases (b) Entropy decreases
(c) Entropy increases
(d) Interaction developed between gas and solid particles
5. The nature of bonding forces in adsorption are:
(a) Purely physical such as vander Waal’s forces (b) Purely chemical
(c) Both chemical and physical are possible (d) None of these
6. Which one of the following is not applicable to chemisorption?
(a) Heat of adsorption is negative (b) It takes places at high temperature
(c) It is reversible (d) It forms mono-molecular layer
7. Which one of the following characteristics is correct for physical adsorption?
(a) It is very specific
(b) Adsorption on solids is irreversible
(c) Adsorption decreases with decrease in temperature
(d) Generally both enthalpy and entropy of adsorption are negative
8. Which of the following statement is not correct?
(a) Physical of the following statement is not correct?
(b) Physical adsorption is irreversible
(c) Chemical adsorption increases with increases in temperature upto certain limit than decrease
(d) Enthalpy of adsorption (|?H|) for a chemical adsorption is greater than that of physical
Adsorption
9. Which gas will be adsorbed on a solid to greater extent?
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
Mob.011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com
(a) Having non-polar molecule (b) Having highest critical temperature
(c) Having lowest critical temperature (d) Having lowest critical pressure
10. Which of the following factors affects the adsorption of a gas on solid?
(a) Critical temperature (T c) (b) Temperature of gas
(c) Pressure of gas (d) All of these
11. Absorption and adsorptions are respectively:
(a) Surface phenomena, bulk phenomena (b) Bulk phenomena, surface phenomena
(c) Both are bulk phenomena (d) Both are surface phenomena
12. Adsorption is multilayer in case of:
(a) Physical adsorption (b) Chemisorption
(c) Both (a) and (b) (d) None of these
13. Reversible adsorption is:
(a) Chemical adsorption (b) Physical adsorption
(c) Both (a) and (b) (d) None of these
14. The effect of pressure on adsorption is high if:
(a) Temperature is low (b) Temperature is high
(c) Temperature is very high (d) larger charcoal piece is taken
15. Sorption is the phenomenon:
(a) Reverse of adsorption
(b)Reverseofabsorbption
(c) when adsorption and absorption takes place simultaneously
(d) None of these
16. Which of the following adsorption isotherms represents the adsorption of a gas by solid involving
multilayers of formation? (P s = saturation pressure)
(a) (b) (c) (d)
17. A plot of log
x
M
??
??
??
against log P for the adsorption of a gas on a solid given a straight line with
slope equal to:
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
Mob.011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com
(a)
1
n
(b) n (c) log K (d) K
18. According to the adsorption theory of catalysis, the speed of the reaction increases because:
(a) In the process of adsorption, the activation energy of the molecules becomes large
(b) Adsorption produces heat which increase the speed of the reaction
(c) Adsorption lowers the activation energy of the reaction
(d) Adsorption increases the activation energy of the reaction
19. Which among the following statements is false?
(a) Increase of pressure increases the amount adsorption
(b) Increase of temperature may decrease the amount of adsorption
(c) Adsorption may be monolayered or multilayered
(d) Particle size of the absorbent will not affect the amount of adsorption
20. Select incorrect statement:
(a) Lyophilic sols are reversible
(b) Lyophilic sols are self stabilized
(c) Lyophobic sols are obtained from inorganic materials
(d) Lyophobic sols particles are hydrated
21. Which of the following is true in respect of chemical adsorption?
(a) ?H < 0, ?S > 0, ?G > 0 (b) ?H < 0, ?S < 0, ?G < 0
(c) ?H > 0, ?S > 0, ?G < 0 (d) ?H > 0, ?S < 0, ?G > 0
22. For the graph below, select correct order of temperature?
(a) T 1 > T 2 > T 3 (b) T 2 > T 3 > T 1 (c) T 3 > T 2 > T 1 (d) T 1 = T 2 = T 3
23. Although, nitrogen does not absorb on a surface at room temperature, it adsorbs on the surface at
83 K. Which one of the following statements is correct?
(a) At 83 K, there is formation of monolayer
(b) At 83 K, nitrogen is absorbed as atoms
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
Mob.011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com
(c) At 83 K, nitrogen molecules are held by chemical bonds
(d) At 83 K, there is formation of multimolecular layers
24. Select the correct statement(s):
(a) Physical adsorption is specific in nature
(b) Chemical adsorption highly specific in nature
(c) Physical adsorption is due to free valence of atoms
(d) Chemical adsorption is due to stronger interaction of bond formation
25. Select the correct statement(s):
(a) Adsorption is a non-spontaneous process
(b) Surface energy decrease during the process of adsorption
(c) Adsorption takes place with decrease of entropy
(d) In general adsorption is exothermic process
26. Select the correct statement(s):
(a) Physisorption is favoured by low temeperature
(b) Chemisorption is favoured by very high temperature because the process is endothermic
(c) Chemisorption increases with increase in temperature owing to high activation energy
(d) Oxygen adsorbed by charcoal can be desorbed by lowering pressure and temperature
27. If adsorption of a gas on a solid is limited to monolayer formation, then which of the following
statements are true?
(a) At low pressures,
x
m
varies proportionately with p
(b) At moderate pressures,
x
m
varies less than proportionately with p
(c) At high pressures,
x
m
becomes independent of p
(d) At high pressures,
x
m
varies more than proportionately with p
28. According to the adsorption theory of catalysis, the speed of the reaction increases because:
(a) In the process of adsorption, the activation energy of the molecules becomes large
(b) Adsorption produces heat which increase the speed of the reaction
(c) Adsorption lowers the activation energy of the reaction
Page 5
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
Mob.011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com
Surface Chemistry
1. Which are not purely surely surface phenomena?
(a) Adsorption, surface tension (b) Surface tension, viscosity
(c) Absorption, viscosity (d) Absorption, viscosity
2. Absorbed acetic acid on activated carbon is:
(a) Adsorber (b) Absorber (c) Adsorbent (d) Adsorbate
3. Adsorption due to strong chemical forces is called:
(a) Chemisorption (b) Physisorption (c) Both (a) and (b) (d) None of these
4. Adsorption of gases on solid surface is exothermic because:
(a) Free energy increases (b) Entropy decreases
(c) Entropy increases
(d) Interaction developed between gas and solid particles
5. The nature of bonding forces in adsorption are:
(a) Purely physical such as vander Waal’s forces (b) Purely chemical
(c) Both chemical and physical are possible (d) None of these
6. Which one of the following is not applicable to chemisorption?
(a) Heat of adsorption is negative (b) It takes places at high temperature
(c) It is reversible (d) It forms mono-molecular layer
7. Which one of the following characteristics is correct for physical adsorption?
(a) It is very specific
(b) Adsorption on solids is irreversible
(c) Adsorption decreases with decrease in temperature
(d) Generally both enthalpy and entropy of adsorption are negative
8. Which of the following statement is not correct?
(a) Physical of the following statement is not correct?
(b) Physical adsorption is irreversible
(c) Chemical adsorption increases with increases in temperature upto certain limit than decrease
(d) Enthalpy of adsorption (|?H|) for a chemical adsorption is greater than that of physical
Adsorption
9. Which gas will be adsorbed on a solid to greater extent?
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
Mob.011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com
(a) Having non-polar molecule (b) Having highest critical temperature
(c) Having lowest critical temperature (d) Having lowest critical pressure
10. Which of the following factors affects the adsorption of a gas on solid?
(a) Critical temperature (T c) (b) Temperature of gas
(c) Pressure of gas (d) All of these
11. Absorption and adsorptions are respectively:
(a) Surface phenomena, bulk phenomena (b) Bulk phenomena, surface phenomena
(c) Both are bulk phenomena (d) Both are surface phenomena
12. Adsorption is multilayer in case of:
(a) Physical adsorption (b) Chemisorption
(c) Both (a) and (b) (d) None of these
13. Reversible adsorption is:
(a) Chemical adsorption (b) Physical adsorption
(c) Both (a) and (b) (d) None of these
14. The effect of pressure on adsorption is high if:
(a) Temperature is low (b) Temperature is high
(c) Temperature is very high (d) larger charcoal piece is taken
15. Sorption is the phenomenon:
(a) Reverse of adsorption
(b)Reverseofabsorbption
(c) when adsorption and absorption takes place simultaneously
(d) None of these
16. Which of the following adsorption isotherms represents the adsorption of a gas by solid involving
multilayers of formation? (P s = saturation pressure)
(a) (b) (c) (d)
17. A plot of log
x
M
??
??
??
against log P for the adsorption of a gas on a solid given a straight line with
slope equal to:
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
Mob.011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com
(a)
1
n
(b) n (c) log K (d) K
18. According to the adsorption theory of catalysis, the speed of the reaction increases because:
(a) In the process of adsorption, the activation energy of the molecules becomes large
(b) Adsorption produces heat which increase the speed of the reaction
(c) Adsorption lowers the activation energy of the reaction
(d) Adsorption increases the activation energy of the reaction
19. Which among the following statements is false?
(a) Increase of pressure increases the amount adsorption
(b) Increase of temperature may decrease the amount of adsorption
(c) Adsorption may be monolayered or multilayered
(d) Particle size of the absorbent will not affect the amount of adsorption
20. Select incorrect statement:
(a) Lyophilic sols are reversible
(b) Lyophilic sols are self stabilized
(c) Lyophobic sols are obtained from inorganic materials
(d) Lyophobic sols particles are hydrated
21. Which of the following is true in respect of chemical adsorption?
(a) ?H < 0, ?S > 0, ?G > 0 (b) ?H < 0, ?S < 0, ?G < 0
(c) ?H > 0, ?S > 0, ?G < 0 (d) ?H > 0, ?S < 0, ?G > 0
22. For the graph below, select correct order of temperature?
(a) T 1 > T 2 > T 3 (b) T 2 > T 3 > T 1 (c) T 3 > T 2 > T 1 (d) T 1 = T 2 = T 3
23. Although, nitrogen does not absorb on a surface at room temperature, it adsorbs on the surface at
83 K. Which one of the following statements is correct?
(a) At 83 K, there is formation of monolayer
(b) At 83 K, nitrogen is absorbed as atoms
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
Mob.011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com
(c) At 83 K, nitrogen molecules are held by chemical bonds
(d) At 83 K, there is formation of multimolecular layers
24. Select the correct statement(s):
(a) Physical adsorption is specific in nature
(b) Chemical adsorption highly specific in nature
(c) Physical adsorption is due to free valence of atoms
(d) Chemical adsorption is due to stronger interaction of bond formation
25. Select the correct statement(s):
(a) Adsorption is a non-spontaneous process
(b) Surface energy decrease during the process of adsorption
(c) Adsorption takes place with decrease of entropy
(d) In general adsorption is exothermic process
26. Select the correct statement(s):
(a) Physisorption is favoured by low temeperature
(b) Chemisorption is favoured by very high temperature because the process is endothermic
(c) Chemisorption increases with increase in temperature owing to high activation energy
(d) Oxygen adsorbed by charcoal can be desorbed by lowering pressure and temperature
27. If adsorption of a gas on a solid is limited to monolayer formation, then which of the following
statements are true?
(a) At low pressures,
x
m
varies proportionately with p
(b) At moderate pressures,
x
m
varies less than proportionately with p
(c) At high pressures,
x
m
becomes independent of p
(d) At high pressures,
x
m
varies more than proportionately with p
28. According to the adsorption theory of catalysis, the speed of the reaction increases because:
(a) In the process of adsorption, the activation energy of the molecules becomes large
(b) Adsorption produces heat which increase the speed of the reaction
(c) Adsorption lowers the activation energy of the reaction
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009
Mob.011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com
(d) Adsorption increases the activation energy of the reaction
29. Which gas is adsorbed to maximum amount by activated carbon?
(a) H 2 (g) (b) He (g) (c) CO (g) (d) CO 2 (g)
30. The volume of gases NH 3, CO 2, and H 2 adsorbed by one gram of charcoal at 300 K are in order
of:
(a) H 2 > CO 2 > NH 2 (b) NH 3 > H 2 > CO 2 (c) NH 3 > CO 2 > H 2 (d) CO 2 > NH 3 > H 2
ANSWER KEY
1.d 2.d 3.a 4.d 5.c
6.c 7.d 8.c 9.b. 10.d
11.b 12.a 13.b 14.a 15.c
16.a 17.a 18.c 19.d 20.d
21.b 22.a 23.d 24.b,d 25.b,c,d
26.a,c 27.a,b,c 28.c 29.d 30.c
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FAQs on Surface chemistry - IIT JAM
| 1. What is surface chemistry in the context of IIT JAM? |  |
Ans. Surface chemistry is a branch of chemistry that deals with the study of chemical reactions that occur on the surfaces of materials. In the context of IIT JAM, surface chemistry refers to the specific topics and concepts related to surface phenomena, such as adsorption, catalysis, and colloids, which are important for the entrance exam.
| 2. What is adsorption and how is it related to surface chemistry? | |
Ans. Adsorption is the process of accumulation of molecules or ions at the surface of a material. It is related to surface chemistry because adsorption phenomena are primarily studied in this branch of chemistry. Adsorption plays a crucial role in various applications, such as in catalysis, gas purification, and separation techniques.
| 3. How does catalysis relate to surface chemistry? | |
Ans. Catalysis is a process that enhances the rate of a chemical reaction by providing an alternative reaction pathway with lower activation energy. In surface chemistry, catalysis often occurs on the surface of a catalyst material, where reactant molecules can adsorb and undergo chemical reactions. The study of catalysis in surface chemistry involves understanding the mechanisms and factors influencing catalytic reactions.
| 4. What are colloids and why are they important in surface chemistry? | |
Ans. Colloids are a type of mixture where particles of one substance are dispersed in another substance. In surface chemistry, colloids play a significant role as they involve the interaction of particles at the surface. The stability, behavior, and properties of colloids are influenced by surface phenomena, such as adsorption and surface charge. Understanding colloids is crucial in various industrial processes and applications, including emulsions, suspensions, and drug delivery systems.
| 5. How is surface chemistry relevant to industrial processes and applications? | |
Ans. Surface chemistry has immense relevance in industrial processes and applications. It plays a crucial role in catalysis, where catalysts are used to enhance the efficiency of chemical reactions in industries. Surface chemistry is also involved in the design and development of materials with specific surface properties, such as superhydrophobic coatings or self-cleaning surfaces. Additionally, understanding surface phenomena is essential in various fields, including manufacturing, pharmaceuticals, energy conversion, and environmental engineering.
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Document Description: Surface chemistry for IIT JAM 2025 is part of IIT JAM preparation. The notes and questions for Surface chemistry have been prepared according to the IIT JAM exam syllabus. Information about Surface chemistry covers topics like and Surface chemistry Example, for IIT JAM 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Surface chemistry.
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Full syllabus notes, lecture & questions for Surface chemistry - IIT JAM - IIT JAM | Plus excerises question with solution to help you revise complete syllabus | Best notes, free PDF download
Information about Surface chemistry
In this doc you can find the meaning of Surface chemistry defined & explained in the simplest way possible.
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Additional Information about Surface chemistry for IIT JAM Preparation
Surface chemistry Free PDF Download
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Surface chemistry Notes
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Surface chemistry IIT JAM Questions
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The content of Surface chemistry is prepared as per the latest IIT JAM syllabus.
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