Question

Which one is the sublime substance?
i).Table salt
ii).sugar
iii).iodine
iv.)potassium Iodine​

Answer 1

Answer:

Iodine is a dark purplish to black solid which sublimes in air to give purple/violet vapours.

Answer 2

Iodine is the sublime substance.

Option ( iii )

Explanation:

• The substances mostly solids, while heating, change into vapour without changing into liquid are called as Sublime substances.
• The process by which the solids are changed to vapour (gas) directly is called as sublimation.
• Usually this process takes place under low pressure.
• Some solids are undergoing sublimation at atmospheric pressure.
• Examples are iodine, carbon dioxide, naphthalene and arsenic.
• Iodine is a halogen which is in purple - black colour.
• Iodine undergoes sublimation at the temperature which is just above the room temperature.
• Sublimation of Iodine occur spontaneously.

Learn more about Sublimation

Sublimation of iodine is which change physical or chemical

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(a) Define sublimation and sedimentation.

(b) You are provided with a mixture of ammonium chloride, common salt, sand and iron filings. Which of these substances can be separated by sublimation and which by sedimentation ?

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