When a solution of is treated with amyl alcohol and acidified

CHEMISTRY · Single correct · CBSE · Chemistry · d- and f-Block Elements · d- and f-Block Elements

Problem

When a solution of

\text{Na}_2\text{Cr}_2\text{O}_7

is treated with amyl alcohol and acidified

\text{H}_2\text{O}_2

, the layer of amyl alcohol turns blue. What is the blue colouration? (1)

\text{Cr}^{2+}

(2)

\text{CrO}_5

(3)

\text{CrO}_4

(4)

\text{Cr}^{2+} + \text{CrO}_5