| 1 |
How many balloon of 0.25 dm3 capacity at 1 atmospheric pressure can be filled from a hydrogen gas cylinder of 5 dm3 capacity at 10 atmospheric pressure. |
- A. 50
- B. 90
- C. 180
- D. 200
|
| 2 |
Density of a gas is usually expressed in |
- A. kg m-3
- B. kg dm-3
- C. g dm-3
- D. g cm-3
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| 3 |
The real gas obeying Van der Waal's equation will resemble ideal gas is. |
- A. both 'a' and 'b' are large
- B. both 'a' and 'b' and small
- C. 'a' is small and 'b' is large
- D. 'a' is large and 'b' is small
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| 4 |
Which of the following will have the same number of molecule at STP. |
- A. 280 cm3 CO2 and 280 cm3 of N2O
- B. 11.2 dm3 of O2 and 32 g of O2
- C. 44 g of CO2 and 11.2 dm3 of CO
- D. 28 g of N2 and 5.6 dm3 of oxygen
|
| 5 |
The rate of diffusion of a gas of molar mass 72 as compared to H2 will be. |
- A. 1/6 times
- B. 1.4 times
- C. 6 times
- D. same
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| 6 |
the order of the rate of diffusion of gases NH<sub>3</sub>, SO<sub>2</sub>, CI<sub>2</sub>and CO<sub>2 </sub>is |
- A. NH<sub>3 </sub>> SO<sub>2</sub>>CI<sub>2</sub>CO<sub>2</sub>
- B. NH<sub>3</sub>> CO<sub>2</sub>> SO<sub>2</sub>> CI<sub>2</sub>
- C. CI<sub>2</sub>> SO<sub>2</sub>> CO<sub>2</sub>> NH<sub>3</sub>
- D. NH<sub>3</sub>> CO<sub>2</sub>> CI<sub>2</sub>> SO<sub>2</sub>
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| 7 |
An Ideal gas can not be liquefied because. |
- A. Its critical temperature is always above 0 <sup>o</sup>C
- B. It molecules are relatively smaller in size
- C. Its solidify before becoming a liquid
- D. Force operative between its molecules are negligible
|
| 8 |
If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will |
- A. Remain unchanged
- B. Increase four times
- C. Reduce to 1/4
- D. Be doubled
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| 9 |
Partial pressure of oxygen in the air is. |
- A. 156 torr
- B. 157 torr
- C. 158 torr
- D. 159 torr
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| 10 |
The rate of diffusion of a gas is |
- A. Directly proportional to its density
- B. Directly proportional to molecular mass
- C. Inversely proportional to its density
- D. Inversely proportional to square root of its molecular mass
|