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प्रश्न
In the extraction of aluminium: Name the process of concentration of bauxite.
उत्तर
The process of concentration of bauxite is known as Bayer’s process.
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संबंधित प्रश्न
Define the Ore.
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.
Why are the metals like Na, K, Ca and Mg never found in their free state in nature?
Name one metal which is extracted by electrolytic reduction.
Fill in the following blank with suitable word:
Bronze is an alloy of copper and .........
How is zinc extracted from its carbonate or (calamine)? Explain with equations.
A zinc ore on heating in air forms sulphur dioxide. Describe briefly any two stages involved in the conversion of this concentrated ore into zinc metal.
Name two metals which are found in nature mainly in the free state (as metallic elements).
Name one ore of mercury. Which mercury compound is present in this ore? Write its chemical formula.
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
Some metallic oxides can be reduced by hydrogen, carbon and carbon monoxide and some cannot. Explain.
Give reasons, why aluminum is used in:
painting electric and telegraphic poles
Give reasons, why aluminum is used in:
In aluminiothermy
How an ore is concentrated by froth floatation process?
choose the most appropriate term to match the given description.
Heating of the ore in the absence of air to high temperature
Name the methods by which concentrated ore is converted to metallic oxide.
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
Mercury, silver, gold are highly reactive metals.
