Answers

2015-04-28T13:43:10+05:30
(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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