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प्रश्न
Explain the following reaction with the balanced equation.
Dry aluminium hydroxide is ignited at 1000 °C
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उत्तर
When dry aluminium hydroxide is calcined by at 1000 °C, pure aluminium oxide, called alumina is obtained.
\[\ce{\underset{\text{Aluminium hydroxide}}{2Al(OH)_{3(s)}} ->[heat][1000 °C] \underset{\text{Aluminium oxide}}{Al2O_{3(s)}} + \underset{\text{Water vapour}}{3H2O_{(g)}}}\]
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संबंधित प्रश्न
Name two metals which are found in nature in the free state.
What chemical process is used for obtaining a metal from its oxide?
Name the following:
The property possessed by metals by which they can be beaten into sheets.
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
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Bronze is an alloy of copper and .........
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(a) iron
(b) aluminium
(c) mercury
(d) magnesium
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Calamine
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making alloys
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Which method of refining is used to get 99.8% pure aluminium?
Explain the following:
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Read the following passage and answer the questions.
According to the reactivity series, zinc is more reactive than iron, iron is more reactive than silver. During study of this, a student dipped the iron nails in silver nitrate solution.
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Explain in brief types of extraction of moderately reactive metals according to their reactivity.
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(a) Which material will be used as anode and cathode for refining of silver metal by this process?
(b) Suggest a suitable electrolyte also.
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