Class 12 Exam > Class 12 Questions > Which one of the following statements is corr...
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Which one of the following statements is correct:
- a)Brownian movement is more pronounced for smaller particles than for bigger ones
- b)Sols of metal sulphides are lyophilic
- c)Schulze-Hardy law states, the bigger the size of the ion, the greater is its coagulating power
- d)Onewould expect charcoal to adsorb chlorine more strongly than hydrogen sulphide
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Which one of the following statements is correct:a)Brownian movement i...
Brownian Movement:
• Brownian movement is the random movement of particles suspended in a fluid due to collisions with molecules of the surrounding medium.
• The magnitude of Brownian movement is directly proportional to the size of the particle.
• Hence, the smaller the particle, the more pronounced is the Brownian movement.
Sols of Metal Sulphides:
• A sol is a colloidal solution in which the dispersed phase is a solid and the dispersion medium is a liquid.
• Lyophilic sols are those in which the dispersed phase has a strong affinity for the dispersion medium.
• Metal sulphides are usually lyophobic, i.e., they have a weak affinity for the dispersion medium.
• Hence, option 'B' is incorrect.
Schulze-Hardy Law:
• Schulze-Hardy law states that the greater the size of the ion, the greater is its coagulating power.
• Coagulation is the process of settling down of colloidal particles under the influence of some external agency.
• The law holds good for ions of the same charge and for the same concentration of the electrolyte.
• Hence, option 'C' is incorrect.
Adsorption:
• Adsorption is the process of accumulation of a substance at the surface of a solid or a liquid.
• The strength of adsorption depends on the nature of the adsorbent and the adsorbate.
• Charcoal is a good adsorbent for many substances, including chlorine and hydrogen sulphide.
• However, the strength of adsorption depends on the nature of the adsorbate.
• Hence, option 'D' is incorrect.
Conclusion:
• Option 'A' is correct as the Brownian movement is more pronounced for smaller particles than for bigger ones.
• Brownian movement is the random movement of particles suspended in a fluid due to collisions with molecules of the surrounding medium.
• The magnitude of Brownian movement is directly proportional to the size of the particle.
• Hence, the smaller the particle, the more pronounced is the Brownian movement.
Sols of Metal Sulphides:
• A sol is a colloidal solution in which the dispersed phase is a solid and the dispersion medium is a liquid.
• Lyophilic sols are those in which the dispersed phase has a strong affinity for the dispersion medium.
• Metal sulphides are usually lyophobic, i.e., they have a weak affinity for the dispersion medium.
• Hence, option 'B' is incorrect.
Schulze-Hardy Law:
• Schulze-Hardy law states that the greater the size of the ion, the greater is its coagulating power.
• Coagulation is the process of settling down of colloidal particles under the influence of some external agency.
• The law holds good for ions of the same charge and for the same concentration of the electrolyte.
• Hence, option 'C' is incorrect.
Adsorption:
• Adsorption is the process of accumulation of a substance at the surface of a solid or a liquid.
• The strength of adsorption depends on the nature of the adsorbent and the adsorbate.
• Charcoal is a good adsorbent for many substances, including chlorine and hydrogen sulphide.
• However, the strength of adsorption depends on the nature of the adsorbate.
• Hence, option 'D' is incorrect.
Conclusion:
• Option 'A' is correct as the Brownian movement is more pronounced for smaller particles than for bigger ones.
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Which one of the following statements is correct:a)Brownian movement i...
The correct answer is option A
Smaller the size and lesser the viscosity, the faster the motion. Brownian movement arises because of the impact of the molecules of the dispersion medium with the colloidal particles.
As the size of the particle increases, the effect of the impacts average out and the Brownian movement becomes slow. Ultimately, when the dispersed particle becomes big enough to acquire the dimensions of suspension, no Brownian movement is observed.
As the size of the particle increases, the effect of the impacts average out and the Brownian movement becomes slow. Ultimately, when the dispersed particle becomes big enough to acquire the dimensions of suspension, no Brownian movement is observed.
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Which one of the following statements is correct:a)Brownian movement is more pronounced for smaller particlesthan for bigger onesb)Sols of metal sulphides are lyophilicc)Schulze-Hardy law states, the bigger the size of the ion, thegreater is its coagulating powerd)Onewould expect charcoal to adsorb chlorine more strongly thanhydrogen sulphideCorrect answer is option 'A'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which one of the following statements is correct:a)Brownian movement is more pronounced for smaller particlesthan for bigger onesb)Sols of metal sulphides are lyophilicc)Schulze-Hardy law states, the bigger the size of the ion, thegreater is its coagulating powerd)Onewould expect charcoal to adsorb chlorine more strongly thanhydrogen sulphideCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following statements is correct:a)Brownian movement is more pronounced for smaller particlesthan for bigger onesb)Sols of metal sulphides are lyophilicc)Schulze-Hardy law states, the bigger the size of the ion, thegreater is its coagulating powerd)Onewould expect charcoal to adsorb chlorine more strongly thanhydrogen sulphideCorrect answer is option 'A'. Can you explain this answer?.
Which one of the following statements is correct:a)Brownian movement is more pronounced for smaller particlesthan for bigger onesb)Sols of metal sulphides are lyophilicc)Schulze-Hardy law states, the bigger the size of the ion, thegreater is its coagulating powerd)Onewould expect charcoal to adsorb chlorine more strongly thanhydrogen sulphideCorrect answer is option 'A'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which one of the following statements is correct:a)Brownian movement is more pronounced for smaller particlesthan for bigger onesb)Sols of metal sulphides are lyophilicc)Schulze-Hardy law states, the bigger the size of the ion, thegreater is its coagulating powerd)Onewould expect charcoal to adsorb chlorine more strongly thanhydrogen sulphideCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following statements is correct:a)Brownian movement is more pronounced for smaller particlesthan for bigger onesb)Sols of metal sulphides are lyophilicc)Schulze-Hardy law states, the bigger the size of the ion, thegreater is its coagulating powerd)Onewould expect charcoal to adsorb chlorine more strongly thanhydrogen sulphideCorrect answer is option 'A'. Can you explain this answer?.
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