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Which of the following are correct statements :
- a)Spontaneous adsorption of gases on solid surface is an exothermic process as entropy decreases during adsorption
- b)Formation of micelles takes place when temperature is below Kraft Temperature (Tk) and concentration is above critical micelle concentration (CMC)
- c)A colloid of Fe(OH)3 is prepared by adding a little excess (required to completely precipitate Fe3+ ions as Fe(OH)3)) of NaOH in FeCl3 solution the particles of this sol will more towards cathode during electrophoresis.
- d)According to Hardy-Schulze rules the coagulation (flocculating) value of Fe3+ ion will be more than Ba2+ and Na+.
Correct answer is option 'A,C'. Can you explain this answer?
Verified Answer
Which of the following are correct statements :a)Spontaneous adsorptio...
(A) ΔG = ΔH - TΔS < O as ΔS < O so ΔH has to be negative
(B) micelles formation will take place above Tk and above CMC
(C) this solution will be negatively charged.
(D) Fe3+ ions will have greater flocculatibility power so smaller flocculating value.
(B) micelles formation will take place above Tk and above CMC
(C) this solution will be negatively charged.
(D) Fe3+ ions will have greater flocculatibility power so smaller flocculating value.
Most Upvoted Answer
Which of the following are correct statements :a)Spontaneous adsorptio...
Correct Statements:
a) Spontaneous adsorption of gases on solid surface is an exothermic process as entropy decreases during adsorption.
- Spontaneous adsorption is a process where gas molecules adhere to the surface of a solid without any external force or intervention.
- When gas molecules adsorb on a solid surface, the entropy of the system decreases as the gas phase molecules become ordered on the solid surface.
- This leads to a decrease in the internal energy of the system, which results in the release of energy in the form of heat.
- Therefore, it is an exothermic process.
c) A colloid of Fe(OH)3 is prepared by adding a little excess (required to completely precipitate Fe3 ions as Fe(OH)3)) of NaOH in FeCl3 solution the particles of this sol will move towards the cathode during electrophoresis.
- Electrophoresis is a technique used to separate charged particles based on their charge and size under the influence of an electric field.
- In this case, Fe(OH)3 sol particles are negatively charged due to the adsorption of OH- ions on their surface.
- When an electric field is applied, these negatively charged particles move towards the positively charged electrode, which is the cathode.
Incorrect Statements:
b) Formation of micelles takes place when temperature is below Kraft Temperature (Tk) and concentration is above critical micelle concentration (CMC).
- Micelles are formed when surfactant molecules aggregate in a solution to form a structure where the hydrophobic tails are shielded from the solvent and the hydrophilic heads are exposed to the solvent.
- The formation of micelles depends on various factors such as temperature, concentration, and nature of the surfactant.
- The Kraft temperature is the temperature above which micelles cannot be formed.
- The critical micelle concentration is the minimum concentration of surfactant required to form micelles.
- However, the statement mentioned in option b is incorrect as micelles are formed when the temperature is above the Kraft temperature and the concentration is above the critical micelle concentration.
d) According to Hardy-Schulze rules, the coagulation (flocculating) value of Fe3 ion will be more than Ba2 and Na.
- Hardy-Schulze rule states that the coagulating power of an ion is directly proportional to the valency of the ion and inversely proportional to the hydrated radius of the ion.
- The coagulating power of an ion refers to its ability to cause destabilization and precipitation of colloidal particles.
- Based on this rule, the coagulating power of Fe3+ ion should be higher than that of Na+ and Ba2+ ions as Fe3+ has a higher valency and smaller hydrated radius compared to Na+ and Ba2+ ions.
- Therefore, the statement mentioned in option d is correct.
a) Spontaneous adsorption of gases on solid surface is an exothermic process as entropy decreases during adsorption.
- Spontaneous adsorption is a process where gas molecules adhere to the surface of a solid without any external force or intervention.
- When gas molecules adsorb on a solid surface, the entropy of the system decreases as the gas phase molecules become ordered on the solid surface.
- This leads to a decrease in the internal energy of the system, which results in the release of energy in the form of heat.
- Therefore, it is an exothermic process.
c) A colloid of Fe(OH)3 is prepared by adding a little excess (required to completely precipitate Fe3 ions as Fe(OH)3)) of NaOH in FeCl3 solution the particles of this sol will move towards the cathode during electrophoresis.
- Electrophoresis is a technique used to separate charged particles based on their charge and size under the influence of an electric field.
- In this case, Fe(OH)3 sol particles are negatively charged due to the adsorption of OH- ions on their surface.
- When an electric field is applied, these negatively charged particles move towards the positively charged electrode, which is the cathode.
Incorrect Statements:
b) Formation of micelles takes place when temperature is below Kraft Temperature (Tk) and concentration is above critical micelle concentration (CMC).
- Micelles are formed when surfactant molecules aggregate in a solution to form a structure where the hydrophobic tails are shielded from the solvent and the hydrophilic heads are exposed to the solvent.
- The formation of micelles depends on various factors such as temperature, concentration, and nature of the surfactant.
- The Kraft temperature is the temperature above which micelles cannot be formed.
- The critical micelle concentration is the minimum concentration of surfactant required to form micelles.
- However, the statement mentioned in option b is incorrect as micelles are formed when the temperature is above the Kraft temperature and the concentration is above the critical micelle concentration.
d) According to Hardy-Schulze rules, the coagulation (flocculating) value of Fe3 ion will be more than Ba2 and Na.
- Hardy-Schulze rule states that the coagulating power of an ion is directly proportional to the valency of the ion and inversely proportional to the hydrated radius of the ion.
- The coagulating power of an ion refers to its ability to cause destabilization and precipitation of colloidal particles.
- Based on this rule, the coagulating power of Fe3+ ion should be higher than that of Na+ and Ba2+ ions as Fe3+ has a higher valency and smaller hydrated radius compared to Na+ and Ba2+ ions.
- Therefore, the statement mentioned in option d is correct.
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Which of the following are correct statements :a)Spontaneous adsorption of gases on solid surface is an exothermic process as entropy decreases during adsorptionb)Formation of micelles takes place when temperature is below Kraft Temperature (Tk) and concentration is above critical micelle concentration (CMC)c)A colloid of Fe(OH)3 is prepared by adding a little excess (required to completely precipitate Fe3+ ions as Fe(OH)3)) of NaOH in FeCl3 solution the particles of this sol will more towards cathode during electrophoresis.d)According to Hardy-Schulze rules the coagulation (flocculating) value of Fe3+ ion will be more than Ba2+ and Na+.Correct answer is option 'A,C'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Which of the following are correct statements :a)Spontaneous adsorption of gases on solid surface is an exothermic process as entropy decreases during adsorptionb)Formation of micelles takes place when temperature is below Kraft Temperature (Tk) and concentration is above critical micelle concentration (CMC)c)A colloid of Fe(OH)3 is prepared by adding a little excess (required to completely precipitate Fe3+ ions as Fe(OH)3)) of NaOH in FeCl3 solution the particles of this sol will more towards cathode during electrophoresis.d)According to Hardy-Schulze rules the coagulation (flocculating) value of Fe3+ ion will be more than Ba2+ and Na+.Correct answer is option 'A,C'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following are correct statements :a)Spontaneous adsorption of gases on solid surface is an exothermic process as entropy decreases during adsorptionb)Formation of micelles takes place when temperature is below Kraft Temperature (Tk) and concentration is above critical micelle concentration (CMC)c)A colloid of Fe(OH)3 is prepared by adding a little excess (required to completely precipitate Fe3+ ions as Fe(OH)3)) of NaOH in FeCl3 solution the particles of this sol will more towards cathode during electrophoresis.d)According to Hardy-Schulze rules the coagulation (flocculating) value of Fe3+ ion will be more than Ba2+ and Na+.Correct answer is option 'A,C'. Can you explain this answer?.
Which of the following are correct statements :a)Spontaneous adsorption of gases on solid surface is an exothermic process as entropy decreases during adsorptionb)Formation of micelles takes place when temperature is below Kraft Temperature (Tk) and concentration is above critical micelle concentration (CMC)c)A colloid of Fe(OH)3 is prepared by adding a little excess (required to completely precipitate Fe3+ ions as Fe(OH)3)) of NaOH in FeCl3 solution the particles of this sol will more towards cathode during electrophoresis.d)According to Hardy-Schulze rules the coagulation (flocculating) value of Fe3+ ion will be more than Ba2+ and Na+.Correct answer is option 'A,C'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Which of the following are correct statements :a)Spontaneous adsorption of gases on solid surface is an exothermic process as entropy decreases during adsorptionb)Formation of micelles takes place when temperature is below Kraft Temperature (Tk) and concentration is above critical micelle concentration (CMC)c)A colloid of Fe(OH)3 is prepared by adding a little excess (required to completely precipitate Fe3+ ions as Fe(OH)3)) of NaOH in FeCl3 solution the particles of this sol will more towards cathode during electrophoresis.d)According to Hardy-Schulze rules the coagulation (flocculating) value of Fe3+ ion will be more than Ba2+ and Na+.Correct answer is option 'A,C'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following are correct statements :a)Spontaneous adsorption of gases on solid surface is an exothermic process as entropy decreases during adsorptionb)Formation of micelles takes place when temperature is below Kraft Temperature (Tk) and concentration is above critical micelle concentration (CMC)c)A colloid of Fe(OH)3 is prepared by adding a little excess (required to completely precipitate Fe3+ ions as Fe(OH)3)) of NaOH in FeCl3 solution the particles of this sol will more towards cathode during electrophoresis.d)According to Hardy-Schulze rules the coagulation (flocculating) value of Fe3+ ion will be more than Ba2+ and Na+.Correct answer is option 'A,C'. Can you explain this answer?.
Solutions for Which of the following are correct statements :a)Spontaneous adsorption of gases on solid surface is an exothermic process as entropy decreases during adsorptionb)Formation of micelles takes place when temperature is below Kraft Temperature (Tk) and concentration is above critical micelle concentration (CMC)c)A colloid of Fe(OH)3 is prepared by adding a little excess (required to completely precipitate Fe3+ ions as Fe(OH)3)) of NaOH in FeCl3 solution the particles of this sol will more towards cathode during electrophoresis.d)According to Hardy-Schulze rules the coagulation (flocculating) value of Fe3+ ion will be more than Ba2+ and Na+.Correct answer is option 'A,C'. Can you explain this answer? in English & in Hindi are available as part of our courses for JEE.
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Which of the following are correct statements :a)Spontaneous adsorption of gases on solid surface is an exothermic process as entropy decreases during adsorptionb)Formation of micelles takes place when temperature is below Kraft Temperature (Tk) and concentration is above critical micelle concentration (CMC)c)A colloid of Fe(OH)3 is prepared by adding a little excess (required to completely precipitate Fe3+ ions as Fe(OH)3)) of NaOH in FeCl3 solution the particles of this sol will more towards cathode during electrophoresis.d)According to Hardy-Schulze rules the coagulation (flocculating) value of Fe3+ ion will be more than Ba2+ and Na+.Correct answer is option 'A,C'. Can you explain this answer?, a detailed solution for Which of the following are correct statements :a)Spontaneous adsorption of gases on solid surface is an exothermic process as entropy decreases during adsorptionb)Formation of micelles takes place when temperature is below Kraft Temperature (Tk) and concentration is above critical micelle concentration (CMC)c)A colloid of Fe(OH)3 is prepared by adding a little excess (required to completely precipitate Fe3+ ions as Fe(OH)3)) of NaOH in FeCl3 solution the particles of this sol will more towards cathode during electrophoresis.d)According to Hardy-Schulze rules the coagulation (flocculating) value of Fe3+ ion will be more than Ba2+ and Na+.Correct answer is option 'A,C'. Can you explain this answer? has been provided alongside types of Which of the following are correct statements :a)Spontaneous adsorption of gases on solid surface is an exothermic process as entropy decreases during adsorptionb)Formation of micelles takes place when temperature is below Kraft Temperature (Tk) and concentration is above critical micelle concentration (CMC)c)A colloid of Fe(OH)3 is prepared by adding a little excess (required to completely precipitate Fe3+ ions as Fe(OH)3)) of NaOH in FeCl3 solution the particles of this sol will more towards cathode during electrophoresis.d)According to Hardy-Schulze rules the coagulation (flocculating) value of Fe3+ ion will be more than Ba2+ and Na+.Correct answer is option 'A,C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following are correct statements :a)Spontaneous adsorption of gases on solid surface is an exothermic process as entropy decreases during adsorptionb)Formation of micelles takes place when temperature is below Kraft Temperature (Tk) and concentration is above critical micelle concentration (CMC)c)A colloid of Fe(OH)3 is prepared by adding a little excess (required to completely precipitate Fe3+ ions as Fe(OH)3)) of NaOH in FeCl3 solution the particles of this sol will more towards cathode during electrophoresis.d)According to Hardy-Schulze rules the coagulation (flocculating) value of Fe3+ ion will be more than Ba2+ and Na+.Correct answer is option 'A,C'. Can you explain this answer? tests, examples and also practice JEE tests.
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