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Write chemical equations for the following reactions: (i) Calcium metal reacts with water. (ii) Cinnabar is heated in the presence of air (iii) Manganese dioxide is heated with aluminum power. |
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Answer» (i) Ca + H2O → Ca(OH)2 + H2 (ii) 2HgS + 3O2 → 2HgO + 2SO2 (iii) No, reaction takes place because manganese is less reactive than aluminium. |
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