JEE Advanced Chemistry question

An experiment involving absorption of oxygen and its quantitative estimation would involve use of

(A)Caustic soda
(B)PyrogallolCorrect
(C)Conc sulphuric acid
(D)Turpentine oil

Answer: (B)

Solution

Alkaline pyrogallol solution is the classic reagent that selectively and quantitatively absorbs oxygen gas (forming oxidised pyrogallol derivatives), making it the standard reagent used

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Question ID VK-159458