1) Name 2 reactants needed for the preparation of soap. a) Glyceryl tristearate b) Stearic acid c) Glycerol  d) Sodium hydroxide 2) Name this compound a) Glycerol b) Glyceryl tristearate c) Stearic acid d) Sodium hydroxide 3) Name this compound a) Glycerol b) Glyceryl tristearate c) Stearic acid d) Sodium hydroxide 4) Fats and oils are chemically classified as: a) A. Alcohols b) B. Aldehydes c) C. Esters d) D. Ketones 5) The alcohol present in natural fats/oils is: a) A. Ethanol b) B. Methanol c) C. Glycerol d) D. Propanol 6) Glycerol contains how many –OH groups? a) A. 1 b) B. 2 c) C. 3 d) D. 4 7) A fatty acid used in the experiment is: a) A. Ethanoic acid b) B. Stearic acid c) C. Benzoic acid d) D. Carbonic acid 8) The process of breaking down fats with NaOH is called: a) A. Neutralisation b) B. Polymerisation c) C. Saponification d) D. Oxidation 9) The product formed alongside soap in the reaction is: a) A. Water b) B. Carbon dioxide c) C. Glycerol d) D. Sodium chloride 10) Ethanol is used in the experiment because it: a) A. Precipitates the soap b) B. Dissolves the fat/oil c) C. Reacts with NaOH d) D. Removes glycerol 11) What apparatus allows boiling without loss of solvent? a) A. Desiccator b) B. Fractionating column c) C. Reflux condenser d) D. Büchner funnel 12) Anti-bumping granules are added to: a) A. Increase yield b) B. Prevent vigorous boiling c) C. Neutralise NaOH d) D. Remove water 13) During reflux, droplets are seen: a) A. Evaporating off b) B. Falling back into the flask c) C. Freezing d) D. Sticking in the condenser 14) After reflux, the apparatus is rearranged for: a) A. Filtration b) B. Distillation c) C. Crystallisation d) D. Titration 15) The purpose of distillation in this experiment is to remove: a) A. Glycerol b) B. Water c) C. Soap d) D. Ethanol 16) Ethanol must be removed because: a) A. It dissolves the soap b) B. It is flammable c) C. It is toxic d) D. It forms a precipitate 17) Glycerol does NOT distil off because: a) A. It is insoluble b) B. It has a high boiling point c) C. It is volatile d) D. It reacts with NaOH 18) When the hot mixture is poured into concentrated brine, soap: a) A. Melts b) B. Dissolves c) C. Precipitates d) D. Oxidises 19) The brine solution mostly contains: a) A. NaHCO₃ b) B. NaCl c) C. Na₂SO₄ d) D. KCl 20) Soap is insoluble in brine because: a) A. Glycerol interferes b) B. Brine is too cold c) C. Salt reduces the solubility of soap d) D. Soap reacts with NaCl 21) What filtration method is used to collect the soap? a) A. Gravity filtration b) B. Centrifugation c) C. Büchner funnel + vacuum filtration d) D. Reflux filtration 22) Glycerol after filtration is found in the: a) A. Solid soap b) B. Filter paper c) C. Filtrate (liquid) d) D. Distillate 23) After filtration, the soap is washed with: a) A. Hot water b) B. Ice-cold water c) C. Hydrochloric acid d) D. Fresh ethanol 24) A desiccator is used to: a) A. Heat the soap b) B. Remove moisture c) C. Neutralise NaOH d) D. Distil ethanol 25) Name this product a) Sodium stearate b) Soap c) Glycerol d) Ethanol 26) The non-polar part of a soap molecule is the: a) A. Ionic head b) B. Hydrocarbon tail c) C. Carboxylate group d) D. Sodium ion 27) What group is present in the polar end of a soap molecule? a) A. –OH b) B. –COO⁻ Na⁺ c) C. –CHO d) D. –NH₂ 28) The polar part of a soap molecule helps soap dissolve in: a) A. Oil b) B. Air c) C. Water d) D. Carbon dioxide 29) The long carbon chain in a soap molecule is described as… a) Polar b) Non polar 30) The non-polar part of a soap molecule is responsible for… a) A. Dissolving salts in sweat b) B. Dissolving oil and grease 31) What is saponification? a) A. The reaction of a fat with water to form alcohol b) B. The reaction of a fat/oil with a strong base to form soap and glycerol c) C. The reaction of an acid with a metal to form salt and hydrogen d) D. The reaction of glycerol with a base to form fat 32) Soap can dissolve both oil and water because it is: a) A. Fully non-polar b) B. Fully polar c) C. Neither polar nor non-polar d) D. A molecule with both polar and non-polar parts 33) How do you test the soap made? a) A. Heat the soap with ethanol b) B. Add the soap to acid c) C. Shake the soap with deionised water in a test tube d) D. Dissolve the soap in oil 34) Which step is carried out first? a) b) c) d) 35) Which step is carried out second? a) b) c) d)

Making Soap

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