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प्रश्न
Give reasons.
Carbonate and sulphide ores are usually converted into oxides during the process of extraction.
Give a reason for the following:
Carbonate and sulphide ores are usually converted into oxides during the process of extraction of metals.
उत्तर १
Carbonate and sulphide ores are usually converted into oxides during the process of extraction because metals can be easily extracted from their oxides rather than from their carbonates and sulphides.
उत्तर २
It is easier to extract metals from their oxide ores by reduction process than from their carbonate and sulphide ores. Hence, carbonate and sulphide ores are usually converted into oxides during the metals extraction process.
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संबंधित प्रश्न
Give reasons.
Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
In the extraction of aluminium: Draw the diagram for the extraction of aluminium.
Why does a new aluminium vessel lose shine so soon after use?
Describe with one example, how moderately reactive metals (which are in the middle of reactivity series) are extracted.
Give the name of one ore of iron. Which iron compound is present in this ore? Write its chemical formula.
Name one ore of mercury. Which mercury compound is present in this ore? Write its chemical formula.
The metal which can be extracted from the bauxite ore is:
(a) Na
(b) Mn
(c) Al
(d) Hg
Manganese metal is extracted from manganese dioxide by a reduction process by making use of:
(a) carbon
(b) hydrogen
(c) electrolysis
(d) aluminium
Which metal can be extracted from the following ore?
Haematite
Define the following term.
Gangue
Name the following:
The process in which an ore is heated in air so that oxygen gets added to it to form the oxides.
Complete the incomplete statement with missing words:
Metals are ______ while non-metals are ______ conductors of heat.
Atomic number of aluminium is _______ and its electronic configuration is _______.
Write the name.
Metals which are amphoteric in nature.
Mercury, silver, gold are highly reactive metals.
Gold and silver are active metals.
Which of the following metals exist in their native state in nature?
- Cu
- Au
- Zn
- Ag
Electrical wires have a coating of an insulting material. The material, generally used is
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.
