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Study the diagram below and answer the questions that follow

a).What observation is made when the iodine is heated?
b).Name the process which iodine undergoes when heated
c).Give two other substances which undergoes the process named in b above

Answer Text:
a).The dark purple crystalline iodine, turns to visible purple vapor.
b).Sublimation –Iodine changes directly from solid to gaseous state without passing through liquid state.
c).Ammonium Chloride and Dry-Ice.