Which of the following will exhibit sublimation? (a) Camphor (b) Sand (c) Salt (d) Sugar
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Answer:
camphor
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Answered by
4
Answer:
Camphor
Explanation:
List of Substances that undergoes sublimation
These are some common substances that undergo sublimation upon heating under the normal atmospheric pressure condition.
- dry ice (solid CO2, carbon dioxide)
- Ice & snow ( from Water )
- iodine crystals
- Naphthalene (mothballs)
- Camphor
- Caffeine ( under vacuum )
- Arsenic
- Phthalic Anhydride
- C60 (buckyballs) which sublimes at atmospheric pressure, but only at around 800 K.
* Ammonium chloride
But :
NH4Cl sublimates only in a normal way from gas to solid, in reverse it won’t do it at room temp, you need heat, and it will actually not just sublimate but will decompose ( into HCl & NH3 gas) but then recombines to NH4Cl ; so you can call it a pseudo sublimation.
E.g.: caffeine, extraction and sublimation, to purify :
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