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Write balanced equations for the reactio...

Write balanced equations for the reactions of :
(i) Aluminium when heated in air. Write the name of the product.
(ii) Iron with steam. Name the product obtained.
(iii) Calcium with water. Why does calcium start floating in water ?

Text Solution

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(i) `4Al + 3O_(2) rarr 2Al_(2)O_(3)`, Aluminium oxide.
(ii) `3Fe + 4H_(2)O rarr Fe_(3)O_(4) + 4H_(2)`, Ferric oxide
(iii) `Ca + 2H_(2)O rarr Ca(OH)_(2) + H_(2)`, because hydrogen sticks to calcium.
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