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Which of the following sets of operation will completely separate a mixture of sodium chloride,...

Chemistry
JAMB 2019

Which of the following sets of operation will completely separate a mixture of sodium chloride, sand and iodine?

  • A. addition of water, filtration, evaporation to dryness and sublimation
  • B. filtration, evaporation to dryness, addition of water and sublimation
  • C. sublimation, filtration, evaporation and addition of water
  • D. sublimation, addition of water, filtration and evaporation to dryness
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Correct Answer: Option A
Explanation

Process:

Add water to the mixture and then filter. The resultant is a salt solution as your filtrate and a mixture of iodine and sand as your residue. Evaporate the filtrate to dryness to get your sodium chloride (salt). Heat the residue to sublime the iodine from the sand.

Addition of water \(\to\) Filtration \(\to\) Evaporation \(\to\) Sublimation.

There is an explanation video available below.


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Explanation Video

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WAEC offline past questions - with all answers and explanations in one app - Download for free
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995