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प्रश्न
Explain the following reaction with the balanced equation.
Sodium aluminate reacts with water
उत्तर
Sodium aluminate reacts with water to give aluminium hydroxide as a precipitate and sodium hydroxide.
\[\ce{\underset{\text{Sodium aluminate}}{NaAlO_{2(aq)}} + \underset{\text{Water}}{2H2O_{(l)}} -> \underset{\text{Sodium hydroxide}}{NaOH_{(aq)}} + \underset{\text{Aluminium hydroxide}}{Al(OH)_3↓}}\]
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संबंधित प्रश्न
Metallic oxides of zinc, magnesium and copper were heated with the following metals.
| Metal | Zinc | Magnesium | Copper |
| Zinc oxide | – | – | – |
| Magnesium oxide | – | – | – |
| Copper oxide | – | – | – |
In which cases will you find displacement reactions taking place?
Name a reducing agent that may be used to obtain manganese from manganese dioxide.
Name one metal which is extracted by reduction with heat alone.
What iron compound is present in haematite ore? Also write its chemical formula.
Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
The metal which can be extracted simply by heating the cinnabar ore in air is:
(a) Zn
(b) Cu
(c) Al
(d) Hg
Zinc blende ore can be converted into zinc oxide by the process of:
(a) roasting
(b) hydrogenation
(c) chlorination
(d) calcination
A metal which exists as a liquid at room temperature is obtained by heating its sulphide ore in the presence of air.
(a) Name the metal and write its chemical symbol.
(b) Write the name and formula of the sulphide ore.
(c) Give the equations of chemical reactions involved in the production of metal from its sulphide ore.
(d) Name a common device in which this metal is used.
(e) Can this metal displace copper from copper sulphate solution? Why?
Give the principles of the hydrolytic method.
Name the following:
The substance added to get rid of gangue in the extraction of metal.
Name the following:
The process of heating a substance very strongly in such a way that it does not combine with oxygen.
What is galvanized iron.
Name a non- metal that has a metallic luster and sublimes on heating.
Find the odd one out and give its explanation.
Write the name.
Metals which are amphoteric in nature.
Explain the reactions of nonmetals with water with the help of examples.
Explain the characteristics of ionic compounds.
Explain the following reaction with the balanced equation.
Chlorine dissolved in water
Explain Bayer’s process of concentration of bauxite with a chemical equation.
