I dont believe this even b4 the nacl can evaporated to dryness iodine had already sublimed 

D should be crtt
First u sublime iodine then adde both the sand and nacl in water since sand is insoluble nacl will then dissolve in water then filter out the sand remaining water and nacl then heat that solution to dryness remaining salt in it

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.

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

JAMB UTME

addition of water, filtration, evaporation to dryness and sublimation

filtration, evaporation to dryness, addition of water and sublimation

sublimation, filtration, evaporation and addition of water

sublimation, addition of water, filtration and evaporation to dryness

Earlier discussion