How to Test for an Aldehyde?

Take the given organic compound in a clean test tube. Add Fehling's solution to it and heat the solution gently. If a brick-red precipitate appears then the presence of aldehyde is conformed.

What is the general test for the presence of aldehydes?

Tollen's reagent is a classical organic laboratory technique to test for the presence of an aldehyde. The reagent consists of silver(I) ions dissolved in dilute ammonia. When the aldehyde is oxidized, the silver(I) ions are reduced to silver metal.

How do you test for aldehyde A level chemistry?

Test for aldehydes

Fehling's solution (a mixture of solutions of copper sulphate and sodium hydroxide) is a blue solution which when gently heated with an aldehyde forms a red precipitate of copper(I) oxide. Ketones do not undergo a visible change.