Question 21 : The Law which applies most commonly to the cases of a gas collected over water, is?
1. Dalton's Law
2. Charles Law
3. Graham's Law
4. Avogadro's Law
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Question 22 : When two gases of same molecular masses are present at constant temperature and pressure, which of the following statement is true about the two gases?
1. They posses same Kinetic energy
2. The have same rate of diffusion
3. They have same boiling points
4. All of the above are correct
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Question 23 : The formula used to calculate Partial pressure of a gas is?
1. P(gas) = P X n(gas) / n(Total)
2. P(gas) = n(gas) X n(Total) / P
3. P(gas) = P X n(Total) / n(gas)
4. P(gas) = P X n(gas) X n(Total)
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Question 24 : The rate of diffusion of hydrogen gas is three times faster than that of X gas at same temperature and pressure, the molecular mass of gas X is?
1. 600%
2. 18
3. 16
4. 2
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Question 25 : Nitrogen and Ethene (C2H4) have the same rates of diffusion at a fixed temperature because?
1. Both have multiple bonds in them
2. Both are electrically neutral molecules
3. Both are covalent compounds
4. Their molecular masses are same
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Question 26 : The rate of diffusion of a gas is inversely proportional to the square root of the density of that gas. This is that statement of?
1. Dalton's Law
2. Boyle's Law
3. Graham's Law
4. Charle's Law
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Question 27 : Two gases Helium & Sulphur dioxide are enclosed in a porous vessel. The comparison of diffusion rates will be?
1. He diffuses 16 times faster than SO2
2. He diffuses 4 times faster than SO
3. SO2 diffuses 16 times faster than He.
4. SO2 diffuses 4 times faster than
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Question 28 : The density of methane (CH4) at 2 atm pressure and 27°C is?
1. 0.012 gm/dm3
2. 154 gm/dm3
3. 7 gm/dm3
4. 3 gm/dm3
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Question 29 : Which of the following gas diffuse most rapidly?
1. N2
2. H2
3. CH4
4. He
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Question 30 : The general gas equation is represented as?
1. PV = nRT
2. R = PVnT
3. V = nRTP
4. T= PV/nR
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