Oxidation state of chromium in its compound having orange coloured solution is +6 as K2Cr2O7
K=+1
O=−2
Cr=+6
2K+ + Cr2O−27
Cr2O−27 = 2x+7×(−2)=−2
2x=12
x=6
Hydrogen peroxide is detected by using acidified TiO2. An orange coloured compound (B) is formed. The change in oxidation state of ‘Ti’ in this reaction is:___