. Kiran took 6 moles carbon dioxide gas in a container A and Arun took 6 moles of carbon
monoxide in a container B at STP conditions. Then which of the following statements are correct.
i) The mass in container A is more than container B [ ]
ii) The volume of carbon dioxide in container ‘A’ is more than volume of carbon monoxide in
container B.
iii) The volume of Both gases in container A and B is same
iv) The mass in container A is less than container B
a) i, ii only b) ii, iii only c) ii, iv only d) i, iii only
Answers
Answer:
1. The Greek "atomists" believed in atoms a. because of experiments with combining gases. b. because of diffusion experiments. * c. on philosophic arguments. d. because they believed the alchemists. 2. Water and sugar form a * a. mixture. b. element. c. compound. d. molecule. 3. Sodium and chlorine form a a. mixture. b. element. * c. compound. d. dichotomy. 4. If 4 grams of oxygen combine completely with 3 grams of carbon to form carbon monoxide (1 carbon atom and 1 oxygen atom in each molecule), how many grams of oxygen does it take to combine completely with 3 grams of carbon to form carbon dioxide (1 carbon atom and 2 oxygen atoms)? a. 2 b. 4 c. 6 * d. 8 5. Avogadro suggested that each liter of gas under identical conditions has the same a. mass b. number of atoms * c. number of atoms or molecules d. density 6. If 1 liter of oxygen combines completely with 2 liters of hydrogen to form water, how many liters of oxygen are required to combine completely with 8 liters of hydrogen? a. 2 * b. 4 c. 6 d. 8 7. If an atom of titanium is four times as massive as an atom of carbon, what is the atomic mass of titanium? a. 3 amu b. 12 amu c. 24 amu * d. 48 amu 8. The atomic mass of carbon monoxide is 28 atomic mass units. What is the atomic mass of oxygen if each molecule contains one atom of carbon and one of oxygen? a. 12 b. 14 * c. 16 d. 22 9. If the atomic mass of neon is 22 amu, how much neon would be needed to have an Avogadro's number of neon atoms? a. 22 amu b. 11 grams * c. 22 grams d. 22 kilograms 10. We now know a great deal about atoms. The size of an atom, very roughly, is * a. about one to a few times 10^-10 meters in diameter, for the lightest to the heaviest atoms. b. about one to a few times 10^-15 meters in diameter, for the lightest to the heaviest atoms. c. exactly 10^-10 meters in diameter, for all atoms. d. exactly 10^-15 meters in diameter, for all atoms. 11. The modern picture of the atom is that it consists of a. electrons, protons and neutrons distributed evenly throughout. * b. a tiny nucleus made of protons and neutrons surrounded by an "electron cloud" whose total extent is about 100,000 times the size of the nucleus. c. a tiny nucleus made of protons and neutrons surrounded by an "electron cloud" whose total extent is about 100 times the size of the nucleus. d. a tiny nucleus made of quarks surrounded by a "cloud" of electrons, protons and neutrons whose total extent is 10,000 times the size of the nucleus. 12. The pressure that a gas exerts on the walls of its container is a direct result of the a. repulsive forces between gas molecules. b. combined volume of the gas molecules. * c. collisions of the gas molecules with the walls. d. combined mass of the gas molecules. 13. If the column in an alcohol-in-glass thermometer were not uniform, the spacing between degrees on a wide portion of the thermometer would be _____ those on a narrow portion. * a. closer than b. the same as c. wider than d. The answer would depend on the type of alcohol. 14. Why is body temperature NOT a good fixed temperature for establishing a temperature scale? a. It is not hot enough. b. It is not a whole number. * c. It varies for an individual and among individuals. d. Body temperature cannot be measured until a temperature scale is developed. 15. Which of the following statements is true for an ideal gas? The average _____ of an ideal gas is proportional to the _____ temperature. a. speed ... Celsius b. kinetic energy ... Celsius c. speed ... Kelvin * d. kinetic energy ... Kelvin 16. Which of the following doubles with a doubling of the absolute temperature of an ideal gas? a. average momentum b. average speed c. average velocity * d. average kinetic energy 17. The pressure in a container filled with gas increases when it is heated because a. the walls do work on the gas. * b. the average momentum of each gas particle increases in size. c. the number of gas particles increases. d. the volume of the gas decreases. 18. The mass of an oxygen molecule is 16 times that of a hydrogen molecule. If the gases are maintained at the same temperature, what is the ratio of the rms speed of an oxygen molecule to that of a hydrogen molecule? a. 1/16 * b. 1/4 c. 4 d. 16 19. If the volume of an ideal gas is held constant, what happens to the temperature if the pressure is doubled? The temperature a. quadruples. * b. doubles. c. is cut in half. d. is cut to one-fourth. 20. Four liters of an ideal gas is heated from 200 K to 400 K in a container with a fixed volume. If the initial pressure was 1 atm, what is the final pressure? a. 4 atm * b. 2 atm c. 0.5 atm d. 0.25 atm