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Module Assessment
1. What can
Thiobacillus ferrooxidans
oxidize?
A. aluminium and sulfur compounds
B. ferrous iron, ferric iron, and carbon
C. carbon, aluminum, and phosphorous compounds
D. sulfur compounds, ferrous iron, and ferric iron
2. How is stainless steel different than steel?
A. Stainless steel is an alloy of steel and copper which gives it stronger properties.
B. Stainless steel is steel mixed with chromium that forms a protective layer that reduces rusting.
C. Stainless steel is steel with the impurities removed and purified.
D. Stainless steel is a different metal than steel with similar properties but is more oxidant resistant.
3. What is a transition metal?
A. A valuable metal that is found in ore and mined.
B. A metal that is in a transition of gaining an electron.
C. A metal that is in a transition of losing an electron.
D. A metal that can have multiple oxidation states.
4. What is an acidic solution?
A. a solution where the concentration of hydroxide ions is greater than the concentration of hydrogen ions
B. a solution where the concentration of hydrogen ions is equal to the concentration of hydroxide ions
C. a solution where the concentration of hydrogen ions is greater than the concentration of hydroxide ions
D. none of these
5. What is a buffered solution?
A. a solution that resists pH changes
B. a solution that has a pH of less than 7
C. a solution that has a pH of greater than 7
D. a solution that drastically changes the pH
6. What does an ore contain?
A. valuable materials like plastic
B. valuable minerals and metals like copper
C. invaluable minerals like sand
D. none of these
7. What is the order of the extraction of copper?
A. extraction, mining, purification
B. mining, extraction, purification
C. mining, purification, extraction
D. extraction, purification, mining
8. What does malleable mean?
A. the material can be shaped easily
B. the material conducts electricity well
C. the material conducts heat well
D. the material doesn't leach into drinking water
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