| 1 |
Normal temperature and pressure (S.T.P) of gas rafers to |
- A. 273 K and 76 mm Hg
- B. 273° C and 760 mm Hg
- C. 273 K and 760 mm Hg
- D. 273° C and 76 mm Hg
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| 2 |
Which of the following will have the same number of molecules at STP |
- A. 280 cm<sup>3</sup>of CO<sub>2</sub>and 280 cm<sup>3</sup>of N<sub>2</sub>O
- B. 11.2 dm<sup>3</sup>of O<sub>2</sub>and 32 g of O<sub>2</sub>
- C. 44 g of CO<sub>2</sub>and 11.2 dm<sup>3</sup>of CO
- D. 28 g of N<sub>2</sub>and 5.6 dm<sup>3</sup>of oxygen
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| 3 |
The number of molecules in one dm<sup>3</sup>of water is close to |
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| 4 |
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
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| 5 |
The order of the rate of diffusion of gases NH3, SO3, Cl2 and CO2 is. |
- A. NH3>SO2>CL2>CO2
- B. NH3>CO2>SI2>Cl2
- C. Cl2>SO2>CO2>NH3
- D. Cl2>SO2>CO2>NH3
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| 6 |
If temperature of one mole of ideal gas at 273 K and one atmospheric pressure is increased by 1 K, amount of energy absorbed is. |
- A. 0.082 dm3 atm
- B. 1.987 cal.
- C. 8.313 J
- D. All are correct.
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| 7 |
Rate of diffusion of CO and N<sub>2</sub>are same at room temperature due to the reason, that |
- A. Both are diatomic molecules
- B. Both have same multiple bond in them
- C. Both have lone pairs in them
- D. Both have same molar masses
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| 8 |
At which distance a molecule is present from its neighbor molecules of its own diameter, at room temperature. |
- A. 100 times
- B. 200 times
- C. 300 times
- D. 400 times
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| 9 |
If we plot a graph between I/V at x-axis and pressure at Y -axis |
- A. a parabolic graph is obtained
- B. By increasing temperature straight line move toward x axis
- C. By increases temperature straight line move toward y axis.
- D. No. change in line by increasing temperature.
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| 10 |
Which one of the following gases cannot be liquefied by Line's method. |
- A. Water vapours
- B. NH3
- C. Nitrogen
- D. H2
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