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प्रश्न
A metal whose alloy finds use in the construction of aircrafts in the powdered form is added to sodium hydroxide solution. A colourless gas was evolved and after reaction was over, the solution was colourless.
(a) Name the powdered metal added to sodium hydroxide solution.
(b) Name the gas evolved.
(c) Name the salt present in the colorless solution.
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उत्तर
(a) The powdered metal added to sodium hydroxide solution is Aluminium.
(b) The gas evolved is hydrogen .
(c) The salt present in the colorless solution is sodium aluminate (NaAIO2).
Concept Insight:
The alloy of aluminium meta l i.e. duraluminium finds use in
the construction of aircrafts. Reaction of aluminium metal with sodium hydroxide is as:
\[\ce{2Al + 2NaOH + 2H2O -> 2NaAlO2 +3H2}\]
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