EXAM 2b; 18 Apr '01
NAME_____________________/
1. Experiment 8 was based on the fact that
xa. more carbon dioxide gas dissolves at low temperatures
b. at high temperature increased carbon dioxide gas dissolved
c. dissolved CO2 is not related to temperature in a regular pattern
d. acidity in moles of acid/liter is directly related to temperature
2. Photosynthesis - the kind that produces glucose and oxygen from carbon dioxide and water
a. requires light
b. needs a catalyst
c. proceeds in the dark
xd.a&b above
3. Photochemical smog needs
a. light b. hydrocarbons c. NOx d. ozone xe. all above
4. London smog or SOx related smog
a. is mainly related to pollutants produced by cars & trucks
b. is from smelters and fuel burning
c. is not produced by natural processes
d. is related to acid precipitation
xe. b&d above
5. Japan is being inundated with acid precipitation from China & Korea. Most of this comes from coal use in smelting & electric utilities.
a. If Japanese waterways and lakes do not have calcium carbonate in them, this acid insult should be minimal.
b. Japan may need to buffer its fresh water bodies
c. SOx is the culprit
xd. b&c above above
6. Endorphins and enkaphalins
a. cause ozone depletion
b. cause climatic warming
xc. enhance mood in people
d. cause damage to DNA
7. The most abundant fossil fuel in the U.S. is
xa. coal b. natural gas c. petroleum d. all are the same
8. The main reason that Adirondack water bodies are so easily acidified is
a. there is little iron in these lakes
b. there is too much CaCO3
c. There is too little CaCO3 in the surrounding soil
d. Too much salt is used on the roads
9. Given that calcium ion is Ca+2 and Phosphate ion is (PO4)-3 calcium phosphate is
a. Ca(PO4) b.Ca2(PO4)3 xc. Ca3(PO4)2 d. none of the above
10. The most recent data ranks _______ as the most significant acid rain producer(s)
a. SOx b. NOx c. particulates (soot) d. carbon monoxide e. a&b
11. Using the attached table of ions & names, the compound Ca(SO4) would be
a. calcium carbonatexb. calcium sulfate c. calcium sulfite d. calcium bisulfate
12.CFCs
xa. are probably responsible for upper atmosphere ozone depletion
b. cause acid precipitation
c. cause photochemical smog
d. are radioactive
13. Oxygen is not needed to
xa. reduce pyruvic acid to lactic acid
b. oxidize lactic acid
c. burn fats
d. oxidize iron
e. b,c,d
14. Aerobic exercise
a. can not contribute to weight loss
xb. needs oxygen
c. results in lactic acid in muscles
d. uses mainly glucose after 45 min. continuous exercise
e. is the type of exercise that leaves one breathless and muscle fatigued
15. Carbon dioxide and water
a. can be reduced to pyruvic under conditions of insufficient oxygen during exercise
xb. can eventually result from oxidation of lactic acid
c. will eventually be oxidized to glucose
d. results from only fat metabolism
16. If sulfur were burned in the jug during lecture
EQUATION: S + O2 = SO2
a. the universal indicator in the water at the bottom of the jug should become red (acid indication) after a period of burning
b. sulfur was oxidized
c. two elements formed a compound
d. The pH of the water went down
xe. all above
17. Rates of reaction increase when
a. concentration is decreased
xb. temperature is increased
c. the proper stars are lined up
d. erlenmeyer flasks are used instead of beakers
e. b,c,d
18. A chemical used in neutralizing the acid in New York State lakes is
a. NaHCO3 b. NaOH xc. CaCO3 d. HCl e. a&c
e. none above
19. Fat burning enzymes
a. make lactic acid
xb. need oxygen
c. are fatty acids
d. need pyruvic acid
20. A strong base should
a. be a weak electrolyte b. turn red litmus red c. turn phenolphthalein clear d. have a low pH
e. give a bright light when tested as was done in lecture
21. Carbon dioxide molecules
a. are implicated in the greenhouse effect
b. are implicated in ozone destruction
c. are used by Dr Kevorkian in his home visits
d. are prime contributors to acid precipitation
e. are the worst (regarding adverse health effects) pollutants
22. Rust or the corrosion indicated by a blue precipitation was more evident when
xa. the solution was of a pH 8 or more
b. the solution was a pH of 7 or less
c. the solution was a ph over 9
d. none above
2 3. In the titration of vitamin C. (Titrated to blue endpoint with iodine)
xa. more drops, more vitamin C b. more drops, less vitamin C c. more starch, more vitamin C
d. drops and vitamin C have no relationship.
24. Buffers in chemistry
a. are easily affected by small amounts of acid
b. are greatly affected by small amounts of base
c. do not resist pH change when acids or bases are added
xd. are present in blood
25. The substances needed for iron corrosion are
a. phenolphthalein and iron
b. water and iron
xc. water, oxygen and iron
d. potassium ferricyanide , water , agar-agar and iron
26. Fat utilization in human metabolism is
a. associated with specific fat burning enzymes that need no oxygen to function
b. associated with production of large amounts of lactic acid
c. associated with short intense exercise such as sprints , basketball, and hockey
xd. associated with slow steady exercise that is primarily aerobic
27. Enzymes
a. are carbohydrates b. are fats c. are catalysts d. can grow xe. c&d above
28. London smog is based on
a .NOx b. CFCs c. CO2 xd. SOx
29. In general, ionic bonds occur
a. between metals b. between nonmetals xc. between metals and nonmetals d. in Mn
30. In experiment 8, soda, a titration was completed to determine the moles acid in cold and hot soda samples. Choose the true statement(s).
a. acid and sodium hydroxide do not react in definite proportions
xb.a 50 mL sample of hot club soda should have less acid than a cold sample
c. if the buret is inadvertently left open so that NaOH solution drips into the soda sample after a pink color remains for 20 sec, a false low value for moles acid will be found upon calculation.
d. starch was the indicator
Exam is completed---be sure you have written the color on your answer sheet. Turn in both the answer sheet & booklet.