When heated, solid iodine sublimes i.e. it directly changes into a gaseous state without converting to liquid state. Which of the following is NOT true for iodine sublimation?

The change is fast.

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The change is physical.

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The change is chemical.

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The change is reversible.

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Solution

The correct option is C The change is chemical.
In sublimation of iodine, a change of state occurs from solid to gas without converting to liquid. It is a physical change which happens quickly, and is reversible too.

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