The disappearance of the characteristic purple colour of `KMnO_(4)` in its reaction with an alkene is the test for unsaturation it is known as:

Options

A. Markownikov’s test
B. Baeyer's test
C. Wurtz's test
D. Grignard test

Answer

B

Explanation

With alkaline `KMnO_4` (Baeyer's reagent) unsaturation of compound can be test
`R-overset(H)overset(|)C=overset(H)overset(|)C-H + [O]+H-OH overset(alk. KMnO_4)underset(-OH)rarr underset("(Colourless)")underset("Glycol")(R- overset(H)overset(|)underset(OH)underset(|)C- overset(H)overset(|)underset(OH)underset(|)C-H)`