CIC+Chapter+2+Quiz - Chemistry in Context: Chapter 2 1....

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Unformatted text preview: Chemistry in Context: Chapter 2 1. Which isotope has 6 neutrons? a) b) c) d) C‐13 Li‐6 O‐15 N‐13 2. Which statement concerning CFCs is true? a) b) c) d) CFCs can release chlorine atoms in the stratosphere CFCs were replaced because they are toxic and flammable CFCs cannot be used under any circumstances in the U.S. All CFCs contain only carbon, fluorine, chlorine, and hydrogen 3. A diatomic molecule has the structure shown. What could be the identity of the atom "X" in the structure? a) b) c) d) C F N O 4. Which region of the atmosphere contains the "good" ozone that helps to protect us from ultraviolet rays? a) b) c) d) ionosphere mesosphere stratosphere troposphere 5. How many protons, neutrons, and electrons are in a neutral atom of 64Cu 29 a) b) c) d) protons = 64, neutrons = 29, electrons = 29 protons = 35, neutrons = 29, electrons = 35 protons = 29, neutrons = 64, electrons = 35 protons = 29, neutrons = 35, electrons = 29 6. Which statement comparing these two waves in the electromagnetic spectrum is correct? a) b) c) d) Wave 1 has a higher frequency and travels at a slower forward speed than Wave 2 Wave 1 has a higher frequency and travels at the same forward speed as Wave 2 Wave 1 has a lower frequency and travels at a faster forward speed than Wave 2 Wave 1 has a lower frequency and travels at the same forward speed as Wave 2 7. Which of these types of solar radiation has the least potential for damage to biological systems? a) b) c) d) infrared microwave ultraviolet X‐ray 8. What was the Montreal Protocol's main strategy for reversing stratospheric ozone depletion? a) b) c) d) eliminating illegal CFCs from being imported or exported requiring developing and developed countries to follow the same restrictions on CFCs improving computer modeling of the upper atmosphere to monitor CFCs limiting the production and use of CFCs 9. Which subatomic particles are found in the nucleus of an atom? a) b) c) d) protons and neutrons protons and electrons neutrons and electrons protons, neutrons, and electrons 10. For any region of the electromagnetic spectrum, the energy of a photon is a) b) c) d) directly proportional to the frequency directly proportional to the wavelength equal to the speed of light equal to Planck's constant, h 11. What is a free radical? a) b) c) d) an unstable chemical species with an unpaired electron a molecule that breaks apart in UV light a different molecular form of a compound one form of an element that differs in number of neutrons from another form of the same element 12. O2 and O3 are: a) b) c) d) isotopes allotropes catalysts isomers 13. Which is a correct statement? a) b) c) d) UV‐A is more energetic than either UV‐B or UV‐C UV‐B is more energetic than either UV‐A or UV‐C UV‐C is more energetic than either UV‐A or UV‐B UV‐A, UV‐B, and UV‐C are equally energetic 14. Which statement best explains why you cannot get a suntan from standing in front of your radio? a) All parts of the electromagnetic spectrum have the same energy and therefore radio waves would not cause a suntan. b) The energy associated with a radio wave is not sufficient to interact with skin pigments c) Radio waves have long wavelengths and high frequency. Low frequency waves are necessary to interact with skin pigments. d) The energy associated with a radio wave would be sufficient to interact with skin pigments, but the waves are shielded by the radio's housing. 15. Which is the correct Lewis dot symbol for an atom of carbon? a) b) c) d) 16. The largest percentage of energy from the Sun comes to Earth in the form of a) b) c) d) microwaves ultraviolet radiation infrared radiation visible light 17. You have seen images of the Earth that show a large area of dark purple centered on Antarctica. Which statement best explains the purple color in these images? a) b) c) d) These are real‐color photographs showing the sky to be purple rather than blue over the poles These are false‐color images in which purple represents very low levels of stratospheric ozone These are real‐color photographs that represent the UV Index in that region These are false‐color images in which purple represents very high Dobson Unit readings 18. Which statement concerning ozone is correct? a) Ozone is considered beneficial in the troposphere because it protects us from ultraviolet light but is an air pollutant in the stratosphere b) Ozone is considered an air pollutant in the troposphere but beneficial in the stratosphere because it protects us from ultraviolet light c) Ozone is considered an air pollutant in both the troposphere and stratosphere because of its toxicity d) Ozone is considered beneficial in both the troposphere and stratosphere because it protects us from ultraviolet light 19. How many protons, neutrons, and electrons are in a neutral atom of 52‐Cr? a) b) c) d) protons = 24, neutrons = 24, electrons = 24 protons = 24, neutrons = 28, electrons = 24 protons = 24, neutrons = 28, electrons = 28 protons = 28, neutrons = 52, electrons = 24 20. What are polar stratospheric clouds (PSCs)? a) PSCs are thin clouds that form in the stratosphere, often containing ice crystals b) PSCs are thin clouds that form in the stratosphere, often containing CFCs c) PSCs are very dense clouds that form in the stratosphere, often containing ice crystals, sulfuric acid, and hydrochloric acid d) PSCs are very dense clouds that form only in Antarctica, obscuring visibility because the embedded ice crystals 21. The Chapman cycle describes the formation and destruction of ozone in the stratosphere. Which statement is true for this natural cycle? a) b) c) d) Ozone is formed by reaction of an oxygen molecule with an oxygen atom. Ozone is destroyed by reaction with the free radical Cl•. Ozone is formed in the cycle by the reaction of three oxygen atoms. Ozone is destroyed by the absorption of an appropriate wavelength of infrared light. 22. A certain brand of skin moisturizer advertises that it contains SPF 15 sunscreen that protects from UV‐A and UV‐B rays. Why isn't UV‐C mentioned in its product claims? a) UV‐C radiation is not absorbed by ozone, so it has no connection to the story of increased exposure to UV rays or ozone depletion. b) UV‐C radiation is not as dangerous as is UV‐B radiation, so whether or not we are shielded from it does not matter. c) UV‐C radiation is extremely dangerous, but it is completely absorbed in the upper atmosphere by oxygen, O2, as well as ozone, O3. There is no need. d) UV‐C radiation is a natural part of the electromagnetic spectrum, so it only has the same potential for harm as visible light. 23. HFCs are being developed to replace CFCs. Which of these compounds is a HFC? a) b) c) d) CCl2F2 CH3CFCl2 CCl3CFCl2 CF3CH2F 24. The ozone hole is most prominent on Earth over which region? a) b) c) d) North America Europe Antarctica Africa 25. CFCs rise into the stratosphere and a) b) c) d) react directly with stratospheric ozone to destroy it become free radicals that destroy ozone react with other free radicals, removing CO2 become free radicals that react with O2 to form O3 26. Consider this equation in which h and c are constants. This equation shows that the energy, E, of a single photon is a) b) c) d) directly proportional to the frequency of radiation and directly proportional to its wavelength inversely proportional to the frequency of radiation and inversely proportional to its wavelength directly proportional to the frequency of radiation and inversely proportional to its wavelength inversely proportional to the frequency of radiation and directly proportional to its wavelength 27. The fact that electrons in many molecules are arranged so that every atom has eight electrons is known as: a) b) c) d) quantized photons resonance forms Lewis structures the octet rule 28. Ozone in the stratosphere is ‘good’ because: a) b) c) d) it’s a totally different molecule than ozone in the troposphere it blocks UV energy it absorbs CFC molecules it interacts with the chlorine that is released from CFCs Chapter 2: Answers 1) 6) 11) 16) 21) 26) d d a c a c 2) 7) 12) 17) 22) 27) a b b b c d 3) 8) 13) 18) 23) 28) b d c b d b 4) 9) 14) 19) 24) c a b b c 5) 10) 15) 20) 25) d a a a b ...
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