Write balanced chemical equation for the following reaction:
(a) When copper is heated in air.
(b) When aluminium is heated in air.
(c) Aluminium oxide reacts with Sodium hydroxide.
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a. 2Cu + O2 gives 2CuO.
b. 4Al + 3O2 gives 2Al2O3.
c. Al2O3 + 2NaOH gives 2NaAlO2 + H2O.
c.Explanation: When aluminium oxide reacts with sodium hydroxide,it gives sodium aluminate and water.
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why it is not double displacement reaction
everytime it won't be that......in this reaction it gives sodium @aluminate
bcoz this reaction takes place at high temperature... about 900 to 1000degree Celsius
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