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प्रश्न
Explain the following reaction with the balanced equation.
Sodium aluminate reacts with water
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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
Name the following:
Main ore of aluminium.
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?
How many carats is pure gold? Why is pure gold not suitable for making ornaments?
Why are the metals like Na, K, Ca and Mg never found in their free state in nature?
How is manganese extracted from manganese dioxide, MnO2? Explain with the help of an equation.
Explain giving one example, how highly reactive metals (which are high up in the reactivity series) are extracted.
Explain given equation, what happens when ZnCO3 is heated in the absence of air?
Explain why, an aqueous solution of sodium chloride is not used for the electrolytic extraction of sodium metal.
Which of the following pair of metals exists in their native state in nature?
(a) Ag and Hg
(b) Ag and Zn
(c) Au and Hg
(d) Au and Ag
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
To protect iron from rusting, it is coated with a thin layer of zinc. Name the process.
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
What is the difference between calcination and roasting?
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
In electrolytic reduction of alumina _______ is used as a cathode.
In the electrolytic reduction of alumina, the lining of graphite acts as an anode.
Explain the following reaction with the balanced equation.
Chlorine dissolved in water
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Give the reason why the above reaction is known as a thermite reaction.
