What were the starting materials used in the synthesis of the thermochromic material? a. diethylamine HCl and isopropyl alcohol O b. Copper (II) chloride and absolute ethanol O c. diethylamine HCl and CuCl, O d. isopropyl alcohol and pure ethanol
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- What is the product? CALA © B. C OC. D OD. B MeO₂C A. CO₂Me H MeO₂C. ಚಿಕ C. MeO₂C B. MeO₂C. D._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. AntioxidantsWhat are the structures of Q and R in the following reaction scheme? A. What is the structure of Q? B. Br PPh3 PPh3 C. 1. PPh3 2. strong base D. PPh3 PPh3 Q → R What is the structure of R B. O E. OH D. For F.
- HO. Q U H joglo A B C D KMnO4, NaOH cold H2SO4 H₂O 1. BH3-THF 2. H₂O2, NaOH 1. Hg(OAc) 2, H₂O 2. NaBH4, NaOH-Which substance has the greatest tendency to participate in a chemical reaction with small chain alcohol in an acidified chemical environment? a. Substance A b. Substance B c. Substance C d. Substance D e. Substance E -Which substance is expected to turn blue litmus paper into red color? a. Substance A b. Substance B c. Substance C d. Substance D e. Substance E -The physical properties of the substances are influenced by intermolecular forces of attraction. Which substance(s) are predominantly influenced by the intermolecular association of the molecules via hydrogen bonding? a.Substance A only b. Substance A and C c. Substance A, B, and C d.Substance A, B, C, and D -Aside from London dispersion forces, which substance do you expect dipole interactions to be effective? a. Substance A and B b. Substance B and D c. Substance A and C d. Substance B and E -Which substance will exhibit the lowest melting point? a. Substance A b. Substance B c. Substance C d. Substance D e. Substance E…What is the effect of carbon on the fuel combustion process? And what would happen if the carbon was high in the fuel ?
- C. H₂ Pd catalyst ?Alkyl bromide C 1. diethyl malonate NaOEt, EtOH 2. NaOH, H2O 3. H3O*, heat IncorrectA pharmacist adds 1 pint of Alcohol USP (95% ethanol) to a 1L of a mouthwash formula. What is the new percentage of alcohol present if the original mouthwash was labelled as 12% viv ethanol? O a. 38% Ob.45% Oc. 40% Od. 35% O e. 30%
- Which one of the following cannot be used as a deodorant? 2. a. CaCo3 b. Zn(C17H35CO0)2 C. Al(OH)3 d. Zno Which one of the following is not a suitable disinfectant against corona virus? a. Ethanol solution b. NaAl(OH)4 solution c. Phenol solution d. NaCIO solution Which one of the following phrases is not true? a. Acidic media do not affect soapless soaps b. Synthetic detergents are stronger than soaps C. Synthetic detergents cannot be used in hard water d. Alkylbentene sulphonates are synthetic detergents Dettol is: a. Antifertility. b. Antis ptic. C. Antipyretic. d. Antibiotic. Which one of the following is not an antacid? a. Mg(OH)2 b. CH3COONa c. Milk d. NaHCO3A 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)a) Name the four main compositions of crude oil.b) Identify the process/reaction and draw the chemical structure for each below.i. ethene to polyetheneii. hexane to benzeneiii. octane to paraffin and olefiniv. heptane to 2,2 – dimethylpentane