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Class X Sciences

[papers from previous years]

Classify the following reactions into slow and fast reaction:

(i) Reaction between an acid and a base
(ii) Rusting of iron


(i) Fast reaction. E.g.: When we mix HCl to NaOH, then the products- H2O and NaCl are formed immediately.
(ii) Slow reaction. It take a long time for Fe to turn into rust (Fe2O3.xH2O), due to the action of H2O vapour and CO2 in the air.
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