Q1. Which law (principle) states that the volume of an ideal gas at constant pressure is directly proportional to the absolute temperature?
- AJoule's law
- BCharles's Law
- CAvogadro's law
- DBoyle's Law
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Answer: B) Charles's Law
General Properties of Gases
29 MCQ questions with answers and explanations · page 1 of 2
Test yourself▶ 25 question test
Q2. The pressure/density value for a given amount of gas at a given temperature remains constant. Which law explains this conclusion?
- Afrom Charles's law
- Bfrom Boyle's law
- CFrom Pascal's law
- Dfrom the design of the Avogadro
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Answer: B) from Boyle's law
Q3. When the volume of a gas is reduced at constant temperature, its pressure
- Agoes down
- Bincreases
- CFirst it decreases and then it increases.
- Dremains unchanged
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Answer: B) increases
Q4. The volume of a gas at constant pressure is directly proportional to its absolute temperature. This is called
- ACharles's Law
- BBoyle's Law
- CGelussec's law
- DGraham's Law
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Answer: A) Charles's Law
Q5. Which law in physics states that equal volumes of all gases contain the same number of molecules under the same temperature and pressure?
- AOhm's law
- BAvogadro's Law
- CBoyle's Law
- DCharles's Law
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Answer: B) Avogadro's Law
Q6. If the pressure of a gas is tripled at constant temperature, its volume will become
- Athird
- Bthird
- Chalf
- Dquarter
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Answer: A) third
Q7. The volume of 22 grams of CO² at NTP will be
- A22.4 liters
- B11.2 litres
- C44.8 liters
- D2.24 liters
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Answer: A) 22.4 liters
Q8. Who formulated the law of diffusion of gases?
- ABoyle
- BCharles
- Cavocado
- DGram
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Answer: D) Gram
Q9. rate of diffusion of a gas
- Ais directly proportional to the density
- BIt is directly proportional to the molecular weight.
- Cis directly proportional to the square root of the molecular weight
- Dis inversely proportional to the square root of the molecular weight
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Answer: D) is inversely proportional to the square root of the molecular weight
Q10. The relative velocities of diffusion of different gases at a fixed temperature and pressure are inversely proportional to the square root of their densities." This law is
- ABoyle's Law
- BCharles's Law
- CGraham's Law
- DDalton's law
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Answer: C) Graham's Law
Q11. Which is the correct relationship between the diffusion rates of gases and their densities?
- Ar¹/r²=√d¹/d²
- Br¹/r²√d²/d¹
- Cr¹/r²=d¹/d²
- Dr¹/r²=d²/d¹
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Answer: B) r¹/r²√d²/d¹
Q12. A gas lighter than air is
- Aoxygen
- Bammonia
- Cchlorine
- DPropane
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Answer: B) ammonia
Q13. Under what conditions does a real gas behave like an ideal gas?
- Ahigh pressure and low temperature
- Blow pressure and high temperature
- Chigh pressure and high temperature
- Dlow pressure and low temperature
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Answer: B) low pressure and high temperature
Q14. When an open bottle of perfume is placed in a corner of a room, its fragrance spreads throughout the room. Why does this happen?
- Aevaporation
- Bevaporation
- Cdiffusion
- Dsublimation
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Answer: C) diffusion
Q15. 15. The natural process by which gases mix with each other despite differences in densities, against the gravitational force of the Earth, is called
- Avaporization of gases
- BLiquefaction of gases
- Cdiffusion of gases
- Devaporation of gases
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Answer: C) diffusion of gases
Q16. The vapor density of a gas is 14, its molecular weight will be
- A14
- B21
- C28
- D43
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Answer: C) 28
Q17. What is the molecular weight of a gas relative to its vapor density?
- Adouble
- Btriple
- Cfour times
- Dhalf
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Answer: A) double
Q18. The law of diffusion of gases is used in-
- Ain separating isotopes
- BIn determining the vapor density of gases
- Cseparating a mixture of gases
- DIn all of these
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Answer: D) In all of these
Q19. The rate of diffusion of CO² is less than that of air because it is more diffusive than air.
- Ais lighter
- Bis heavy
- CIt is quite light
- Dare quite heavy
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Answer: B) is heavy
Q20. A chemical reaction between gases is a necessary condition for diffusion of gases.
- Abe possible
- Bmay not be possible
- Cbe slow
- Dbe fast
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Answer: B) may not be possible
Q21. The ratio of the rates of diffusion of oxygen and hydrogen gas is
- A0.044444444444444
- B0.042361111111111
- C0.043055555555556
- D0.084027777777778
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Answer: A) 0.044444444444444
Q22. Under the same conditions of temperature and pressure, whose number is the same in equal volumes of different gases?
- Aof the atom
- Bof the molecule
- Cof the radical
- Dof electron
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Answer: B) of the molecule
Q23. In the gaseous equation pV=RT, nR represents
- AAny atom of the gas
- BOne gram of gas
- Cone mole of gas
- Done liter of gas
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Answer: C) one mole of gas
Q24. Which of the following laws is not related to gases?
- ABoyle's Law
- BCharles's Law
- CGay-Lussac's law
- DFaraday's law
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Answer: D) Faraday's law
Q25. Compressing a gas
- AThe stakes only rise
- BOnly the temperature rises
- CBoth pressure and temperature increase
- Dpressure increases and temperature decreases
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Answer: C) Both pressure and temperature increase