問題詳情

23.resorcinol於鹽酸存在下,會使下列何者呈現橘紅色反應?
(A)sucrose
(B)fructose
(C)mannose
(D)lactose

參考答案

答案:B
難度:適中0.520661
統計:A(27),B(126),C(25),D(28),E(0)

用户評論

PPMTPASS】評論

Seliwanoff’s test : A test for ketose SUG-ARS in solution. The reagent used consistsof benzene-1,3-diol (resorcinol) dissolved in hydrochloric acid.A few drops are addedto the solution and a red precipitate indi-cates a ketonic sugar. The test is named forthe Russian chemist F. F. Seliwanoff.

Shannon Lai】評論

間苯二酚與濃鹽酸的混合液可用於鑑別醛糖和酮糖,這個試驗稱為Seliwanoff試驗。