page 12 18. Which line in the table best describes the ball-like structures formed when soap is added to an oil and water mixture? Diagram Description A B C D ionic head dissolves in water, non-polar tail dissolves in oil droplet ionic head dissolves in oil droplet, non-polar tail dissolves in water non-polar head dissolves in oil droplet, ionic tail dissolves in water non-polar head dissolves in water, ionic tail dissolves in oil droplet water water water water 19. In an experiment, nickel oxide is added to sulfuric acid until no more nickel oxide reacts. The products are nickel sulfate and water. The correct method to separate and collect a dry, pure sample of nickel sulfate is A evaporation B filtration C filtration followed by evaporation D evaporation followed by filtration. 20. Which of the following compounds would react with sodium hydroxide solution to form a salt? A CH3CHO B CH3COOH C CH3COCH3 D CH3CH2OH
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Exam Specification Info
This question is part of the UK A-Level Chemistry syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.
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