Question
Distinguish between drying and dehydrating agent.

Answer

Drying agentDehydrating agent
(a) They remove moisture from other substances.
(b) They are used to dry gases like chlorine, Sulphur dioxide. They are used in desiccators to keep substances dry.
(c) They represent physical change
i. They remove chemically combined elements of water in the ratio of 2:1 from a compound.
ii. They prepare substances like carbon monoxide, sugar charcoal etc.
iii. They represent chemical change

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