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Q.4. Circle the compound with the highest solubility in water and cross out the compound with the lowest solubility in water. CI OH CI OH Cl Br

A student dissolved 4 drops of an unknown compound in 1 mL of methylene chloride (dichloromethane) in a test tube. They added 5 drops of a 2% solution of bromine in dichloromethane dropwise and mixed the contents within the test tube gently. They observed the red-brown color discharges (turns colorless) until the last drop. What compound is most likely the unknown? ©GMU 2020 Oa. Methanol b. Cyclohexane c. n-Butyl Bromide O d. Hex-2-ene COLE QUESTION 6 A student placed 2 drops of an unknown sample in a test tube and added 2 mL of ethanol to the test tube while mixing gently. They added 2 drops of potassium permanganate reagent to the test tube and mixed the contents of the test tube gently. The initial color was a deep purple but then changed to a yellow color which precipitates as a brown solid. What compound is most likely the unknown? OGMU 2020 a. Cyclopentane O b. Cyclohexene c. 1-Pentyl Chloride d. 2-Propanol SOUL QUESTION 7 A student performed the Beilstein test within a chemical…

Q9 9a: Rank the water solubility of the following compounds: H2N NH2 CH3-0-CH2CH3 H3C. H3C° NH2 TH. 9b: Certain C-H functional groups can form weak hydrogen bonds. Why would such a functional group be more likely to be a H-bond donor when the C (carbon) is next to N (nitrogen)? (explain in 2-3 sentences) 9c: Explain why water forms nearly spherical droplets on the surface of a freshly waxed car. Define the effect from your knowledge in biochemistry (explain in 2-3 sentences)