1.Which of the following is a property of real gases but NOT ideal gases. A) random motion B)...
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1.Which of the following is a property of real gases but NOT ideal gases.
A) random motion B) attractive Forces C) mass D) kinetic energy
2.Ideal gas molecules are considered to have no volume or diameter and are therefore referred to as:
A) point masses B) polar mc C) molar volumes D) mole fractions
3. Random scattering of gas mc from a place of high concentration to a place of low concentration is:
A) migration B) distribution C) diffusion D) effusion
4.A system insulated from the surroundings is:
A) standard state B) dynamic equilibrium C) adiabatic system D) endothermic reaction
5. Diffusion rate is inversely proportional to A) density B) number of mc present in 1 liter in STP C) average temperature D) square root of its molecular mass
6. Which of the following gases will have the highest rate of diffusion?
7. At constant pressure, the volume of a given quantity of gas and the Kelvin temperature of that gas:
A) vary directly B) vary indirectly C) vary inversely D) are unrelated
8. At constant volume, the relationship between the pressure and the Kelvin temp of a gas is such that pressure and Kelvin temp. vary
A) irregularly B) inversely C) indirectly D) directly
9. Avogadro’s principle states that at equal temp and equal pressures, equal volumes of gases
A) have the same density B) have the same average molecular mass C) contain the same number of particles D) have the same diffusion rate
10. Under standard conditions, the volume occupied by one mole of any gas isA) 1 Liter
B) dependent on its density C) called the molar volume D) directly proportional to its molecular
11. If you collect 22.4 L of oxygen at standard conditions, you will have
A) 2 mol of gas B) 16 g of gas C) 359 g of gas D) 1 mol of gas
12. In the ideal gas law “n” stands for A) molecular mass B) moles of gas C) mass of gas D) density of gas
13. What is the effect on the volume of a gas if pressure is doubled. Temp is constant?
A) no effect B) volume increases C) volume decreases D) volume decreases by half
14. AT constant temp, what is the effect on pressure of tripling the volume;
A) it increases B) it decreases C) increases 3X D) no effect
15. At constant pressure, what is the effect on the volume if temperature increases by 1o C
A) volume stays the same B) volume increases C) volume decreases D) no effect
16. At constant volume, what is the effect on the pressure if you double Kelvin temp
A) decrease B) increase C) doubles D_ no effect
17. What is the freezing point of water in Kelvin
A) 32 B) 0 C) – 273 D) 273
18. What is the Kelvin temperature of 25oC?
A) 273 B) 298 C) 248 D) 25
19. If a tiny valve opens in a container with He, Ar, Ne, Kr, which gas will escape the container fastest?
A) Kr B) He C) Ne D) Ar
20. Which of the following statements is always true about two different gas samples at the same temp
A) same average kinetic energy B) same molecular weight C) occupy same volume D) exert the same pressure
21. Which substance has the lowest density?
A) water (l) B) water(g) C) water (s) D) water (aq)
22. The density of a substance undergoes the greatest change when the substance changes from a
A) liquid to solid B) liquid to gas C) solid to liquid D) molecular solid to ionic solid
23. V1P1 = V2P2
A) Charles’ B) Boyle’s C) Gay-Lussac’s D) Dalton’s
24. V1T2 = V2T1
A) Charles’ B) Boyle’s C) Gay-Lussac’s D) Dalton
25. V = nk
A) Dalton B) Gay’Lussac C) Avogadro D) Graham
26. T1P2 = T2P1
A) Dalton B) Graham C) Gay-Lussac D) Avogadro
27. VP = nRT
A) Graham B) Dalton C) Ideal D) Avogadro
29. Pt = P1 + P2 ……..
A) Graham B) Avogadro C) Dalton D) Ideal