How might you distinguish between a primary and secondary alcohol?

A Level

Warm and distill with acidified pottasium dichromate. Then test with tollens reagent. The acidified pottasium dichromate will have oxidised the primary alcohol to an aldehyde, which will form a silver mirror with Tollen's reagent. The secondary alcohol will have been oxidised to a ketone, which does not react with Tollen's reagent.

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