Advertisements
Advertisements
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.
Advertisements
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
Write the probable colour of the following salt:
Ammonium salts
Write the probable colour of the following salt:
Ferrous sulphate
Name the probable cation present in each of the following solution:
Yellow coloured solution
Name the probable cation present in each of the following solution:
Pink coloured solution
Write the colour of the following salt : Calcium salts.
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 the probable cation present based on the following observation:
White precipitate insoluble in NH4OH but soluble in NaOH.
Colour of the precipitate formed on adding NaOH solution to iron (II) sulphate solution is ______.
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.
