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प्रश्न
Arrange the metals of copper, iron, magnesium, sodium and zinc in the decreasing order of reactivity.
उत्तर
Sodium > magnesium > Zinc > Iron > Copper
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संबंधित प्रश्न
Give reasons.
Carbonate and sulphide ores are usually converted into oxides during the process of extraction.
Write the composition of the alloy called bronze.
Name one metal which is extracted by reduction with heat alone.
What is meant by the 'concentration of ore'?
Give reasons, why aluminum is used in:
painting electric and telegraphic poles
Give reasons, why aluminum is used in:
In making ships
Name the following:
The process of heating a substance very strongly in such a way that it does not combine with oxygen.
What is the difference between calcination and roasting?
Bauxite reacts with sodium hydroxide in the Bayer’s process.
Assertion (A): The extraction of metals from their sulphide ores cannot take place without roasting the ore.
Reason (R): Roasting converts sulphide ores directly into metals.
