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As we all know, the CSIR-NET exam is very near, and there is no time left for revision. At this point, you must be seeking some ready-made authentic short revision notes or some important questions to practice just before the exam. How will you react if you get all these study materials in one place? It will be beneficial for you at this time, right! At BYJU'S Exam Prep, we come up with the Most Important Questions of Gaseous State for Chemical Sciences to help you score good marks, which our experienced Exam experts have meticulously designed.
So what are you waiting for? Scroll down the article below and start study for the CSIR NET Exam; these questions will be fruitful during last-minute revision to fetch more marks in the exams. Students can also download it as a PDF file and save it for future purposes.
Gaseous State - Most Important Questions! (Download PDF)
1. Determine the pressure at which the mean free path of argon (g) at 25°C becomes comparable to the size of a 1.0 litre vessel that contains it? Assume that σ = 0.36 nm2.
- 6.1 × 10–4 Torr
- 4.8 × 10–4 Torr
- 6.1 × 10–3 Torr
- 4.8 × 10–3 Torr
2. It is given that the speed of sound in a gas is cs = (γ RT/M)1/2 where γ = Cp/Cv. Calculate the speed of sound in helium at room temperature.
- 2.45 km/s
- 3.02 km/s
- 1.02 km/s
- None of the above
3. Determine the atmospheric pressure at Shimla whose height above the sea level is 2250 m if the pressure at the ground level is 1 atm and temperature is 25°C if there exist no complications such as turbulence or temperature gradients (M = 29 g mol–1).
- 0.7725 atm
- 0.8975 atm
- 0.6754 atm
- 0.7943 atm
4. Calculate the pressure exerted by one mole of carbon dioxide gas in a 1.32 dm3 vessel at 48°C using the van der Waals equation. The van der Waals constants are a=3.59 dm6 atm mol-2 and b=0.0427 dm3 mol-1.
- 20.03 atm
- 12.95 atm
- 18.56 atm
- 22.56 atm
5. Determine the Boyle temperature TB for CO2 gas, assuming it to be a van der Waals gas. The van der Waals constants are a=3.59 dm6 atm mol-2 and b=0.0427 dm3 mol-1.
- 2032 K
- 1026 K
- 1256 K
- 2445 K
6. Determine the critical temperature of a van der Waals gas for which Pc is 100 atm and b is 50 cm3 mol−1.
- 487.2 K
- 357.4 K
- 278.9 K
- 254.6 K
7. Calculate the pressure exerted by one mole of CO2 gas at 40°C, confined to a volume of 0.107 dm3, using the law of corresponding states, given that the critical constant of the gas Vm,c = 0.0957 dm3, TC = 304 K and PC = 73.0 atm.
- 78.23 atm
- 81.03 atm
- 67.23 atm
- 54.32 atm
8. Determine the temperature at which the average velocity of oxygen equals that of hydrogen at 20 K.
- 420 K
- 300 K
- 320 K
- 500 K
9. For hydrogen gas, calculate the root mean square velocity <c2>1/2 at 0°C.
- 1.84×103 m/s
- 1.84×104 m/s
- 3.84×103 m/s
- 3.84×104 m/s
10. Calculate the average translational kinetic energy of an ideal gas per molecule (ε) at 25°C.
- 6.17× 10-21 J per molecule
- 6.17× 10-23 J per molecule
- 6.17× 10-24 J per molecule
- 6.17× 10-25 J per molecule
Solutions
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ANSWER KEYS
- A
- C
- A
- C
- B
- A
- B
- C
- A
- A
Download Important Questions on GASEOUS STATE - Download PDF Here
Check Out:
- Study Notes for CSIR NET Life Science - (Download PDF)
- Study Notes for CSIR NET Chemical Science - Download PDF Here!
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