Hydrogen peroxide can be tested with

Options

A. A filter paper with a stain of black Pos
B. An acidified solution of `TiO_(2)`
C. KI+ starch solution
D. Acidified `K_(2)Cr_(2)O_(7)` solution with little ether

Answer

A, B, C, D

Explanation

Hydrogen peroxide can be tested with
(1) `H_(2)O_(2)`reacts with KI to form `I_(2)` which on reaction with starch producess blue colour soution.
`H_(2)_(2)2KI to 2KOH +I_(2) overset("startch") to` blue color
(2) `H_(2)O_(2)` on reaction with acidified `K_(2)Cr_(2)O_(7)` forms blue peroxide of chromium which is soluble in ether and produces blue colored layer.
(3) `H_(2)O_(2)` gives orange colour (pertitanic acid) on reaction with acidified titanium dioxide
`TiO_(2)+2H_(2)SO_(4) to Ti(SO_(4))_(2)+2H_(2)O- overset(H_(2)O_(2)) to H_(2) TiO_(4)+2H_(2)S_(4)` Per titanic acid
(4) `H_(2)O_(2)` tunr balck PbS into white substance `PbS_(4)`