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प्रश्न
Explain the following reaction with the balanced equation.
Zinc carbonate is heated strongly in limited supply of air
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उत्तर
Zinc carbonate is heated strongly in a limited supply of air to convert it to zinc oxide. This process is called calcination.
\[\ce{\underset{\text{Zinc carbonate}}{ZnCO_{3(s)}} ->[Heat] \underset{\text{Zinc oxide}}{ZnO_{(s)}} + \underset{\text{Carbon dioxide}}{CO_2↑}}\]
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संबंधित प्रश्न
In the extraction of aluminium: Draw the diagram for the extraction of aluminium.
Name a reducing agent that may be used to obtain manganese from manganese dioxide.
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Name one metal which is extracted by electrolytic reduction.
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Explain givem equation, what happens when a mixture of Cu2O and Cu2S is heated?
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(a) magnesium and manganese
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(d) magnesium and aluminium
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what is ignition mixture?
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choose the most appropriate term to match the given description.
Heating of the ore in the absence of air to high temperature
State three objectives achieved during the roasting of ores.
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Explain Bayer’s process.
Explain the following reaction with the balanced equation.
Sodium aluminate reacts with water
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- Metals of low reactivity
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Therefore metals are extracted in pure form from their ores on the basis of their chemical properties.
Metals of high reactivity are extracted from their ores by electrolysis of the molten ore.
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(a) Name the process of reduction used for a metal that gives vigorous reaction with air and water both.
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(c) Describe briefly the method to obtain mercury from cinnabar. Write the chemical equation for the reactions involved in the process.
OR
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The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Identify the substance oxidised and reduced in the above reaction.
