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A "vapor" in chemistry is always the gas phase of a substance that is more familiar in one of its condensed phases: liquid or solid. Therefore, iodine vapor is the gas phase of the element iodine, and has the same molecular composition as the solid, I2. Iodine is a solid at standard temperature and pressure, but sublimes directly to gas phase, without any intermediate liquid phase, at only moderately higher temperatures than the standard.
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A substance that exists as a solid at ordinary temperature but changes to vapour on heating?
Iodine and ammonium salts sublime, their vapours then turn back into solids when cooled down. To see the sublimation, heat some iodine in a china dish and place a funnel upside down above the vapours (violet). The heated vapours become solid on contact with the funnel wall.
What is a dark grey solid that sublimes to form a violet vapor?
The substance you are describing is likely iodine. Iodine is a dark grey solid that can sublime directly from a solid to a vapor without going through the liquid state. When iodine sublimes, it forms a violet vapor.
Which state is a vapour?
The state of vapour is gaseous.
Why does the concentration of iodine ions remains constant in the iodine clock reaction?
Iodine ion is not consumed; in the first step the iodine ion is oxidized to iodine, in the second step iodine is reduced to iodine ion.
Is iodine an alkali metal?
Iodine is not a metal.
Does iodine turn into vapour on heating?
no
Is vapour invisible?
Whi many are, many are not (iodine vapour is quite easily seen, for example, where water vapour is not).
How will you separate iodine and salt mixture?
heat the mixture iodine will sublime collect the iodine vapour separately and cool
These dark crystals turn into a purple vapour when heated?
Iodine
What is the element that contains diatomic molecules and purple in vapour?
Iodine.
What black solid forms a purple vapour when heated gently?
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Voilet colour of iodine vapour is due to?
pi* to sigma* transition
What dark crystals turn into purple vapour when they are heated?
Iodine crystals
Purple iodine vapor appears when solid iodine is warmed is that chemical or physical change?
Purple vapour appearing = physical
What is the purple substance of the iodine after heating?
It is vapour formed during the process of sublimation.
What is the color of the gases Chlorine bromine iodine?
Chlorine is Green gas Bromine is brown/red liquid , with a brown red vapour Iodine is a black solid, with ?? purple??? vapour.
What is the name of the purple gas?
I expect you mean iodine vapour. Please see the link.
