Question

Statue coated with chemical substance X on long positive political atmosphere becomes black.This colors can be restored by treatment with H²O². Identify element X and also types of chemical changes involved.​

Answer 1

Answer:

(i) metal present in paints which gets darkened (black) on long exposure to polluted air

(ii) nature of H2O2

(iii) change in the color of the compound when washed with H2O2

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