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Question
Metal A belongs to period 3 and group 13. A in red hot condition reacts with steam to form B. A with strong alkali forms C. Find A, B, and C with reactions.
Solution
(i) Metal (A) belongs to period 3 and group 13, is Aluminium (Al).
(ii) (A) Al in red hot condition reacts with steam to form Aluminium oxide (B).
\[\ce{\underset{\text{(A)}}{2Al} + \underset{\text{(Steam)}}{3H2O} -> \underset{\text{(Aluminium oxide)(B)}}{Al2O3 + 3H2↑}}\]
(iii) Aluminium (A) reacts with strong alkali forms of sodium meta aluminate (C).
\[\ce{2Al + 2NaOH + 2H2O -> \underset{\text{(C)}}{2NaAlO2} + 3H2↑}\]
| A | Aluminium | Al |
| B | Aluminium oxide | Al2O3 |
| C | Soidum meta aluminate | NaAlO2 |
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