Marks: 1 Stereochemistry is the study of: Choose one answer. a. organic chemistry b. two-dimensional chemistry c. theoretical chemistry d. three-dimensional chemistry
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A: The molecular structure is shown below and the chemical formula of Fluticasone is C22H27F3O4S.
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- 3. What are volatile chemicals? A. Chemicals that exist as gases at ambient conditions (room temperature and pressure) B. Chemicals that are very reactive. C. Chemicals that can evaporate easily at ambient conditions. D. Chemicals that are liquids at ambient conditions.98. In order to check for concentration or amounts of substances, principles of this branch of chemistry is applied: A. Quantitative Chemistry B. Inorganic Chemistry C. Organic Chemistry D.Qualitative Chemistry E. General Chemistry 99. Which of the following leads to an overall decrease in energy of a system? A. Freezing B. Melting C. Vaporization D. SublimationA scientist from which field of chemistry investigates a new form of packaging material that breaks down rapidly in the environment?A. biochemistryB. theoretical chemistryC. environmental chemistryD. inorganic chemistryE. physical chemistry
- 11. Mrs. Folloso is preparing water in containers to sell in their water station. O A. filtration B. decantation C. handpicking D. magnetizing 12. Ms. Ramirez is separating some needles from other materials in the box. A. filtration B. decantation C. handpicking D. magnetizing 13. In the salt industry, men are using heating machines to make salt. * O A. filtration B. evaporation C. magnetizing O D. handpickingWhat is the main purpose of recrystallisation? A. Chemists recrystallise solids when they want to change big crystals into small crystals. B. Chemists recrystallise solids that are contaminated with impurities. If done properly, the solid will then recrystallise in a purer form. C. Chemists recrystallise solids when they want to change small crystals into big crystals.7. The movement of particles of matter can be affected by some external factors. What are the factors that affect the movement of particles of matter? B. Temperature A. Pressure C. Odor and appearance D. Size and temperature
- You want to explore the different colors of ink that are combined to make the black ink in your dry ears marker. Which seperation technique would allow you to see that colors that make up the black ink? A. Filtration B. Chromatography C. Evaporation D. DistillationQuestion 33 Which of the following will give a negative deviation to Beers Law? I. polychromatic radiation II. presence of stray light III. presence of particulates on the sample O A. Il and III only B. I only OC. and Il only O D.I and III onlyWhich of the following is true about heavy metals and their environmental impact? a. Coffee and tea waste could be viable options to rid water of heavy metals. b. Based on the study shown in class, coffee is definitively the best option to rid heavy metals from water. c. Coffee, tea and caffeine all remove heavy metals from contaminated water through absorption. d. Copper is the most prevalent metal found in drinking water that can cause harm to the environment and humans. e. Copper and zinc concentrations in drinking water are significantly higher in areas with human activity.
- Popcorn pops because there is a what type of CHEMICAL evolution: a. oxygen b. water vapor c. carbon dioxide d. plant *Choose only one answerWhich of the following will give a negative deviation to Beers Law? I. polychromatic radiation II. presence of stray light III. presence of particulates on the sample A. I and II only B. II and III only C. I and III only D. I only5. Which tablet size and the liquid combination resulted in the fastest dissolution times? A. crushed, room temperature water B. crushed, hot water C. crushed, room temperature vinegar D. broken, hot water E. broken, room temperature vinegar 6. What is the relationship between particle size and the time it takes for the tablet to dissolve? A. direct proportion B. inverse proportion C. combined proportion D. joint proportion 7. Using the activity as a model, how does mechanical weathering (breaking or crushing) contribute to chemical weathering (dissolution)? A. Increases size of particles B. Decreases dissolution time C. Increases surface area D. Both A and B E. Both B and C