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IDENTIFY EACH COLOR OF THE FOLLOWING
1. WET TISSUE
2. COTTON WITH PUS
3. LEAD
4. PU 239
5. USED LANCET
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- _4. Preservatives that are usually found in cured meats, bacon, ham, corned beef and hot dogs. A. Benzoates C. Sorbates В. Nitrates D. Acids 5. A type of additive that stabilizes foods through moisture control. A. Emulsifiers C. Humectants B. Flavor Enhancer D. Antioxidants 6. Additives that are usually powders added to baking mixtures which react chemically to release carbon dioxide. A. Raising Agents B. Thickeners C. Humectants D. AntioxidantsC. Identify the method for the separation of the following mixtures: 1. Kerosene in water 2. Iron fillings and wood shavings 3. Water and alcohol 4. Salt solution 5. Powdered chalk in water 6. Soil with gasoline 7. Crude oil processing to separate diesel from gasoline 8. Blood components 9. Sand and water 10, oil and waterA is soluble in water. Its water solution is neutral. When the solid substance is heated, brown caramel forms and water droplets are observed. A is __________. a. C12H22O11 (sugar) b. Na2SO4 (sodiumsulfate) c. Na2B4O7.10 H2O (borax) d. NH4Cl (ammoniumchloride)
- During our Laboratory session for Organic chemistry, we were tasked to do a Bromine's test for hydrocarbons. We used 2% Br in CCl4. The samples were: A. Kerosene B. Heptane C. Toluene D. Xylene E. Unknown F. Corn Oil The result is shown in the attached picture. Based on other references, the result should either be a colorless or an orange/brownish solution. However, based on our result, there seems to be a formation of other compounds in some samples. My question is, what is the yellow precipitate-like product in sample A when Bromine was added and the yellow layer at the top of sample F? Could you give the different chemical equations that show the reaction in each sample when Br is added?D is soluble in water. Its water solution is basic. When solid substance is heated, its volume expands and water droplets are observed around the tube but there is no color change. D is __________. a. Na2B4O7.10 H2O (borax) b. Na2SO4 (sodiumsulfate) c. C12H22O11 (sugar) d. NH4Cl (ammoniumchloride)4. Calcium Hydroxide Solution (Lime Water) and olive oil are used because an emulsifying agent is formed in situ when these 2 solutions are agitated together. What is the emulsifying agent that is formed? a. calcium succinate b. calcium oleate c. succinic hydroxide d. palmitic hydroxide
- What is the purpose of Safety Data Sheets? Why are these important when handling common food service chemicals? What information/components are generally included? How do Safety Data Sheets vary?Water pollution is defined only as any physical or chemical change in water that: 1 a. Improves the flow rate of ground water b. Adds good properties to drinking water c. Improves the health of humans and other organisms. d. Adversely affects the health of humans and other living organisms. 03 + NOx + HCs ===> 2 a. VOC b. Smog c. CFCS d. CO2 Which one of the following is not true: 3. a. Sediments destroy organisms life in water. b. Sediments cover aquatic animals and plants. c. Sediments remove insoluble toxins from lakes. d. Sediments decrease light penetration. light at about 120-210 nm + O2 produces: a. 20 b. CIO C. 03 d. H20 One serious environmental problem is: a. Eutrophication b. Increase in DO c. Disinfection d. Decrease in BOD Gasoline motor vehicles are the major source of: 6 a. 03 on earth b. NOx on earth c. CFC's d. NH3 on earthMakes oceans and seas to have higher clarity than lakes and rivers. a. SALINITY b. TURBIDITY c. RESISTIVITY d. CLARITY
- Which of these will NOT dissolve in water? a.table salt b.sugar c.vinegar d.bacon fatOdd one out * a, aqua fortis b. organic or inorganic compound c. pH < 7.0 d. caustic potash Odd one out * a. Granular b. Parent material c, Blocky d. Prismatic Odd one out * a. Sandy b. Loam c. Chalk d. PlatyPhysical Analysis of Water Samples A. WATER POLLUTION VIDEO a. Describe the three categories of water pollution. b. What is eutrophication? What are the uses and effects of eutrophication? c. Describe the emical pollutants in water. FOR PLMYSICAL SCENCE DEPT USE ONLY d. Describe the ways of reducing water pollution.