1. Two bottles at the same temperature containing hydrogen sulphide (H2S) and ammonia (NH3) are placed at equal lengths from you and are opened at the same time. Which gas would you smell first? A. Both C. None B. Hydrogen sulphide D. Ammonia 2. Which of the following gases diffuses the fastest? Oxygen (O2), Hydrogen (H2), Sulphur dioxide (SO2), or Carbon dioxide (CO2)? A. Oxygen C. Hydrogen B. Sulphur dioxide D. Carbon dioxide 3. Which of the following gases diffuses the slowest? Oxygen (O2), Hydrogen (H2), Sulphur dioxide (SO2), or Carbon dioxide (CO2)? A. Oxygen C. Hydrogen B. Sulphur dioxide D. Carbon dioxide 4. Which of the following gases diffuses the fastest? Helium (He), Ammonia (NH3), Hydrogen sulphide (H2S), or Carbon dioxide (CO2)? A. Helium C. Ammonia B. Hydrogen sulphide D. Carbon dioxide 5. Which of the following gases diffuses the slowest? Helium (He), Ammonia (NH3), Hydrogen sulphide (H2S), or Carbon dioxide (CO2)? A. Helium C. Ammonia B. Hydrogen sulphide D. Carbon dioxide 6. Which of the following gases diffuses the fastest? Helium (He), Hydrogen (H2), Sulphur dioxide (SO2), or Carbon dioxide (CO2)? A. Helium C. Hydrogen B. Sulphur dioxide D. Carbon dioxide 7. How much faster does helium gas diffuse than sulphur dioxide? A. 2x C. 4x B. 0.5x D. 0.25x 8. How much faster does hydrogen gas diffuse than sulphur dioxide? A. 5.65x C. 4x B. 0.18x D. 0.25x 9. How will a gas velocity vary if its molecular weight was decreased from 144 g/mol to 64 g/mol? A. It will be faster by 200% B. It will remain the same C. It will be halved. D. It will be faster by 150% 10.How will a gas velocity vary if its molecular weight was increased from 32 g/mol to 128 g/mol? A. It will be faster by 200% B. It will remain the same. C. It will be halved. D. It will be faster by 150%
Ideal and Real Gases
Ideal gases obey conditions of the general gas laws under all states of pressure and temperature. Ideal gases are also named perfect gases. The attributes of ideal gases are as follows,
Gas Laws
Gas laws describe the ways in which volume, temperature, pressure, and other conditions correlate when matter is in a gaseous state. The very first observations about the physical properties of gases was made by Robert Boyle in 1662. Later discoveries were made by Charles, Gay-Lussac, Avogadro, and others. Eventually, these observations were combined to produce the ideal gas law.
Gaseous State
It is well known that matter exists in different forms in our surroundings. There are five known states of matter, such as solids, gases, liquids, plasma and Bose-Einstein condensate. The last two are known newly in the recent days. Thus, the detailed forms of matter studied are solids, gases and liquids. The best example of a substance that is present in different states is water. It is solid ice, gaseous vapor or steam and liquid water depending on the temperature and pressure conditions. This is due to the difference in the intermolecular forces and distances. The occurrence of three different phases is due to the difference in the two major forces, the force which tends to tightly hold molecules i.e., forces of attraction and the disruptive forces obtained from the thermal energy of molecules.
1. Two bottles at the same temperature containing hydrogen sulphide (H2S) and
ammonia (NH3) are placed at equal lengths from you and are opened at the
same time. Which gas would you smell first?
A. Both
C. None
B. Hydrogen sulphide
D. Ammonia
2. Which of the following gases diffuses the fastest? Oxygen (O2), Hydrogen
(H2), Sulphur dioxide (SO2), or Carbon dioxide (CO2)?
A. Oxygen
C. Hydrogen
B. Sulphur dioxide
D. Carbon dioxide
3. Which of the following gases diffuses the slowest? Oxygen (O2), Hydrogen
(H2), Sulphur dioxide (SO2), or Carbon dioxide (CO2)?
A. Oxygen
C. Hydrogen
B. Sulphur dioxide
D. Carbon dioxide
4. Which of the following gases diffuses the fastest? Helium (He), Ammonia
(NH3), Hydrogen sulphide (H2S), or Carbon dioxide (CO2)?
A. Helium
C. Ammonia
B. Hydrogen sulphide
D. Carbon dioxide
5. Which of the following gases diffuses the slowest? Helium (He), Ammonia
(NH3), Hydrogen sulphide (H2S), or Carbon dioxide (CO2)?
A. Helium
C. Ammonia
B. Hydrogen sulphide
D. Carbon dioxide
6. Which of the following gases diffuses the fastest? Helium (He), Hydrogen
(H2), Sulphur dioxide (SO2), or Carbon dioxide (CO2)?
A. Helium
C. Hydrogen
B. Sulphur dioxide
D. Carbon dioxide
7. How much faster does helium gas diffuse than sulphur dioxide?
A. 2x
C. 4x
B. 0.5x
D. 0.25x
8. How much faster does hydrogen gas diffuse than sulphur dioxide?
A. 5.65x
C. 4x
B. 0.18x
D. 0.25x
9.
How will a gas velocity vary if its molecular weight was decreased
from 144 g/mol to 64 g/mol?
A. It will be faster by 200%
B. It will remain the same
C. It will be halved.
D. It will be faster by 150%
10.How will a gas velocity vary if its molecular weight was increased from 32
g/mol to 128 g/mol?
A. It will be faster by 200%
B. It will remain the same.
C. It will be halved.
D. It will be faster by 150%
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