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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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संबंधित प्रश्न
Write the probable colour of the following salt:
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Name the probable cation present in each of the following solution:
Light blue coloured solution
Write the colour of the following salt : Ferrous salts.
Write balanced equation for the following reaction:
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Write balanced equation for the following reaction:
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A metal which produces hydrogen on reacting with alkali as well as with acid.
| Abhishek was given a salt ‘X’ which was white in colour for analysis. On strong heating, it produced a yellow residue, a colourless gas and also a reddish-brown gas. The solution of the salt ‘X’, when tested with an excess of ammonium hydroxide, produced a chalky white insoluble precipitate. |
- Name the coloured gas that evolved when Abhishek heated the salt strongly.
- Which cation was present in the sample given to Abhishek?
- Identify the salt given to Abhishek for analysis.
