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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.
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:
\[\ce{2Al + 2NaOH + 2H2O -> 2NaAlO2 +3H2}\]
APPEARS IN
संबंधित प्रश्न
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Write balanced equation for the following reaction:
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Write balanced equation for the following reaction:
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Write balanced equation for the following reaction:
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State what do you observe when:
Lead nitrate and sodium chloride are mixed.
Write the observation, and balanced equation for the following reaction:
Moist starch iodide paper is placed at the mouth of a test tube containing chlorine gas.
The questions (i) to (v) refer to the following salt solutions listed A to F:
- Copper nitrate
- Iron (II) sulphate
- Iron (III) chloride
- Lead nitrate
- Magnesium sulphate
- Zinc chloride
- Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution?
- Which two solutions will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution ?
- Which solution will give a white precipitate, when either dilute hydrochloric acid or dilute sulphuric acid is added to it?
- Which solution becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it ?
- Which solution gives a white precipitate with excess ammonium hydroxide solution?
Name :
a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
