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- Dangerous Paint Stripper Jessica has a summer job working for the city parks program. She has been using a cleaner called “Graffiti Gone” to remove graffiti from the bathrooms. She has to take a lot of breaks, because the chemical makes her throat burn. It also makes her feel dizzy sometimes, especially when the bathrooms don’t have very many windows. On the label, she sees that the cleaner has methylene chloride in it. She feels like she’s managing to get the work done, but she is worried about feeling dizzy. She wants to find out more about this chemical, what harm it can cause, and whether there are safer ways to do this work. Questions for following story. 1. What went right in this situation? 2. What went wrong in this situation? 3. What steps should be taken in this workplace to make sure employees are better protected and prepared the next time?Identify a reagent or way of separation that will separate: a. Tl3+ from Ni2+. Explain the chemistry of the separation. b. Fe3+ from Cr3+. Explain the chemistry of the separation. c. Sb3+ from Cd2+. Explain the chemistry of the separation. d. Ba2+ from Ca2+. Explain the chemistry from the separatioAn example of a heterogeneous catalyst is: a. Wilkinson’s catalyst for the hydrogenation of alkenes b. Grubb’s catalyst with varied substituents for olefin metathesis in THF c. Pt and Pd nanoparticles on ceramic honeycombs in catalytic converters d. Pd(PPh3)4 in toluene solvent used for Miyaura-Suzuki coupling reactions
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- 7. Pay attention to the formula of aloe vera extract lipbalm (Aloe vera.L): Glycerin 5% Cera flava 10% Nipagin 0.18% Lanolin 15% Oleum cacao ad 100% Aloe vera extract 10% The basic ingredients in the formula are.... A. lanolinB. aloe vera extractC. glycerinD. oleum cacaoMultiple Choice Each of the numbered items or incomplete statements is followed by answers or by completions of the statement. Select the one lettered answer or completion that is best in each case. Write your answer before each number. 42. Primary Standard reagent used in standardization of 0.1N sodium hydroxide a. Sulfamic acid C. sodium carbonate KHP b. sodium bicarbonate d. 43.An analyst who determines the strength, potency and percentage purity of a drug or pharmaceutical product is performing: a. Special method C. d. Pharmaceutical assaying Identification test b. Pharmacopoeial test 44.Chemical analysis which determines the amount or percentage content of a certain component in a sample: a. Qualitative C. d. Proximate Ultimate Quantitative ܩ b.Find the connection among the words below and choose the letter of the word which is different.* 1. A. electrical field B. loading dye C. buffer D. gel density 2. A. agarose powder B. buffer C. loading dye D. Ethidium bromide