Decomposition of \( \mathrm{H}_{2} \mathrm{O}_{2} \) is retarded by : (A) traces of acids (B) ac...

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Decomposition of \( \mathrm{H}_{2} \mathrm{O}_{2} \) is retarded by :
(A) traces of acids
(B) acetanilide
(C) finely divided metals
(D) ethyl alcohol.
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