The difference between absorbent and dehydrating agent It would be better to give examples

The absorbent is used to absorb water molecules such as calcium oxide and phosphorus pentoxide.
In addition to absorbing water molecules, dehydrating agents can also remove hydrogen and oxygen from the substance in a ratio of 2:1, such as concentrated sulfuric acid.

Mixed acid reaction of cyclohexane and concentrated sulfuric acid and concentrated nitric acid

Cyclohexane is stable to acid and alkali. It does not react with medium concentration nitric acid or mixed acid at low temperature, and nitrates with dilute nitric acid in a sealed tube above 100°C to form nitrocyclohexane.
So it should produce nitrocyclohexane and sulfocyclohexane

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16. The advantage of producing oxygen with hydrogen peroxide is.
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