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When hydrogen peroxide is added to acidified potassium dichromate, a blue colour is produced due to formation of
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By Expert Faculty of Sri Chaitanya
a
CrO3
b
Cr2O3
c
CrO5
d
CrO42-
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Correct option is C
K2Cr2O7+4H2O2+H2SO4→2CrO5blue + K2SO4+4H2O+12O2
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Statement-I: H2O2 is used to restore the white color of old oil paintings.
Statement-II: H2O2 oxidizes PbS of old oil paintings to PbSO4.
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