Question

•Give two metallurgical facts that justify placing magnesium above iron in the
activity series.
•In metallurgy, what do the term calcinations stand for? Give example?
chloride solution and water.
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Answer 1

Answer:

answer to first question:-

Magnesium metal is extracted by electrolytic reduction only, whereas iron can be extracted by chemical reduction using coke. Therefore Mg should be above iron

In the reactivity series, the metals are placed according to their reactivity. Thus, a metal placed above another can displace the latter from it's salt solution. Since, Magnesium is placed above Iron, it can displace iron in ferrous sulphate solution but iron can't replace magnesium from it's salt solution

misha but i think that this topic is deleted by our syllabus..

extraction is deleted completly

Answer 2

Question :   Give two metallurgical facts that justify placing magnesium above iron in the activity series.

Answer :

1) Magnesium metal is extracted by electrolytic reduction only, whereas iron can be extracted by chemical reduction using coke. Therefore Mg should be above iron.

2) Magnesium can displace iron from ferrous sulphate solution, but iron cannot displace magnesium from magnesium sulphate solution. Therefore magnesium should be above iron.

Question :In metallurgy, what do the term calcinations stand for? Give example?

Answer : Calculations is a chemical process wherein a carbonate ore or an oxide ore is strongly heated in the absence of air, to decompose it to remove volatile matter and moisture.

Hope it will help you ✌