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A 0.5 dm3 flask contains gas 'A' and 1 dm 3 flask contains gas 'B' at the same temperature. If density of  A = 3.0 gm dm -3 and that of B = 1.5 gm dm -3 and the molar mass of A = 1/2 of B, then the ratio of pressure exerted by gases is- 
  • a)
    PA/PB = 2  
  • b)
    PA/PB = 1
  • c)
    PA/PB = 4 
  • d)
    PA/PB = 3
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
A 0.5 dm3flask contains gas 'A' and 1 dm 3flask contains gas &...
Given data:
- Volume of flask containing gas A = 0.5 dm3
- Volume of flask containing gas B = 1 dm3
- Density of gas A = 3.0 gm dm-3
- Density of gas B = 1.5 gm dm-3
- Molar mass of A = 1/2 of B

Calculating the number of moles:
- Number of moles of gas A = Mass / Molar mass = Density * Volume / Molar mass
- Number of moles of gas B = Density * Volume / Molar mass

Given that the molar mass of A is half of B:
- Let the molar mass of gas A be x, then the molar mass of gas B = 2x

Calculating the ratio of the number of moles:
- Number of moles of A / Number of moles of B = (Density of A * Volume) / Molar mass of A / (Density of B * Volume) / Molar mass of B
- This simplifies to: Density of A / Density of B * Molar mass of B / Molar mass of A
- Substituting the given values: 3.0 / 1.5 * 2x / x = 2

Calculating the ratio of pressure:
- The pressure is directly proportional to the number of moles of gas and the temperature
- Since the temperature is the same for both gases, the ratio of pressure is the same as the ratio of the number of moles
- Therefore, the ratio of pressure exerted by gases A and B is 2
Therefore, the correct answer is:

Ratio of pressure exerted by gases A and B = 2
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Community Answer
A 0.5 dm3flask contains gas 'A' and 1 dm 3flask contains gas &...
I don'tknow explain any one
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A 0.5 dm3flask contains gas 'A' and 1 dm 3flask contains gas 'B' at the same temperature. If density of A = 3.0 gm dm -3and that of B = 1.5 gm dm -3and the molar mass of A = 1/2 of B, then the ratio of pressure exerted by gases is-a)PA/PB= 2 b)PA/PB= 1c)PA/PB= 4d)PA/PB= 3Correct answer is option 'C'. Can you explain this answer?
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A 0.5 dm3flask contains gas 'A' and 1 dm 3flask contains gas 'B' at the same temperature. If density of A = 3.0 gm dm -3and that of B = 1.5 gm dm -3and the molar mass of A = 1/2 of B, then the ratio of pressure exerted by gases is-a)PA/PB= 2 b)PA/PB= 1c)PA/PB= 4d)PA/PB= 3Correct answer is option 'C'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about A 0.5 dm3flask contains gas 'A' and 1 dm 3flask contains gas 'B' at the same temperature. If density of A = 3.0 gm dm -3and that of B = 1.5 gm dm -3and the molar mass of A = 1/2 of B, then the ratio of pressure exerted by gases is-a)PA/PB= 2 b)PA/PB= 1c)PA/PB= 4d)PA/PB= 3Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 0.5 dm3flask contains gas 'A' and 1 dm 3flask contains gas 'B' at the same temperature. If density of A = 3.0 gm dm -3and that of B = 1.5 gm dm -3and the molar mass of A = 1/2 of B, then the ratio of pressure exerted by gases is-a)PA/PB= 2 b)PA/PB= 1c)PA/PB= 4d)PA/PB= 3Correct answer is option 'C'. Can you explain this answer?.
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