50 Multiple choice

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timer Asked: May 10th, 2017

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give me the correct answer of each question

for example

1-a

2-c

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CHEM 100.002 Fall 2015 EXAMÍ R.A.DIXON (Fill in the "O" corresponding to the correct answer on the answer sheet: see last page) 1. Electricity is a flow of electrons. a. True b. False watt. hours of energy. 2. A 100 watt light bulb that is on for 3 hours uses a. 100 b. 200 . 300 d. 400 3. Nuclear power plant energy conversion is more efficient than fossil fuel power plant energy conversion, for generating electricity. a. True b. False 4. If you had one gram each of Lithium (Li), Sodium (Na) and Potassium(K), which element could potentially generate more moles of electrons from that one gram, assuming the oxidation reactions shown? a. Lithium Li → Li* + e b. Sodium Na → Na+ + e Potassium K → K+ + e C. a. 5. The correct choice from question #4 could be used as the anode in a: Medium energy density battery b. Low energy density battery e. High energy density battery d. There's no way to tell 6. Electric generators, at nuclear and fossil fuel power plants, create electrons. a. True b. False 7. Heat flowing from regions of higher temperature to regions of lower temperature is a demonstration of: The First Law of Thermodynamics b. The Second Law of Thermodynamics a. 8. The layer of atmosphere closest to the Earth's surface is the: a. Mesosphere b. Stratosphere €. Troposphere 9. The atmosphere is mostly composed of: a. Oxygen b. Nitrogen c. Carbon Dioxide d. Hydrogen 10. The second most common gas in the atmosphere is: a. Oxygen b. Nitrogen c. Carbon Dioxide d. Hydrogen 11. is considered a greenhouse gas. a. Oxygen b. Nitrogen c. Carbon Dioxide d. Hydrogen a. 12. Photochemical reactions are energized by: Rain b. Dust c. Light 13. Photochemical smog forms during: a. The daytime b. The night-time 14. Photochemistry is involved in the formation of stratospheric ozone. a. True b. False 15. Ozone is triatomic oxygen. a. True b. False harmful ultraviolet wavelengths. 16. Stratospheric ozone a. Reflects v b. Absorbs c. Scatters wavelength range(s). 17. Normal Ozone formation and destruction occur at a. Different b. The same FIGURE 1 18. Figure 1 shows CO2 being sent to a depleted oil well (downward pointing arrow). Why? a. To make carbonic acid b. To prevent earthquakes c. To prevent CO2 release to the atmosphere 19. The process of “burying" carbon (as CO2) is called: a. Anti-mining b. Sequestering c. Speculating Some solar radiation is reflected by the atmosphere and earth s suntace SUN Some of the infrared radiation passes through the atmosphere and is lost in space Net outgoing infrared radiation 240 Watt perm Wet incoming solar radiation: 240 Want per m GREEN HOUSE GAS E S Solar radiation passes through the clear atmosphere. Incoming solar radiation: 343 Watt per ma Some of the intrared radiation is absorbed and re-emitted by the greenhouse gas molecules The direct effect is the warming of the earth surface and the troposphere. Surface gains more heat and intrared radiation is emitted again Solar energy is absorbed by the earth's suntace and warms it.. - and is converted into heat causing the emission of longwave Onlard) radiation back to the aungah 168 FIGURE 2 20. Figure 2 is describing: a. The ultraviolet effect b. The formation of acid rain c. The greenhouse effect 21. The effect described in Figure 2 is: ca. Natural b. Unnatural 22. The effect described in Figure 2: a. is considered a problem by scientific consensus b. only describes how greenhouse gases work 23. The effect described in Figure 2 explains ozone destruction. a. True b b. False 24. Global warming occurs: a. because greenhouse gases exist b. because greenhouse gases are increasing in content 25. A substance is a pollutant when: a. It is found where it should not be b. At a level(concentration) it should not be a or b above d. Not a, b, or c above d. w 26. The Ultra violet Index measures: a. The effectiveness of a sun blocking lotion b. The brightness of the sun c. The time required to get skin damage from sunlight 27. What do the greenhouse gases have in common? a. they are all good ultra violet absorbers b. they are all good infra red absorbers c. none are naturally occurring d. none of the above 28. Which of the following gases does not directly contribute to the formation of acid rain? a. SO2 b. NO2 c. N2 29. Most of the world's water is in the oceans, so most of the world's water is: a. Fresh JA b. Salt V 30. Which of the following lists correctly indicates the trend in concentration of dissolved chemicals in types of water indicated (highest concentration to lowest; top to bottom)? C B Salt distilled salt Fresh fresh distilled Distilled salt fresh 31. The pesticides and fertilizers placed on your lawn stay only in your yard. a. True b. False
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