Question

Passage type questions : Arrangment of the metals in decreasing order of their reactivity is known as activity series. K > Na > Ca > Mg > Al Zn > Fe > Pb > Cu High reactivity Moderate reactivity Low reactivity According to above information which metal is extracted by Roasting, Calcination followed by reduction Ag > Au​

Answer 1

Answer:

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Explanation:

The low reactive elements are found in Free state. Eg: Gold, silver, copper, platinum.

The moderately reactive ( Zn, Fe, Pb etc) are found as mainly as oxides, sulphides and carbonates. The sulphides and carbonates are converted into oxides by roasting, and calcination respectively. Then they are extracted by the process of reduction, or displacement reaction.

The highly reactive metals (Potassium, Sodium, Calcium etc) are extracted by electrolytic reduction.

After extraction, these metals are refined electrolytically.

Answer 2

Answer:-

Arrangment of the metals in decreasing order of their reactivity is known as activity series. K > Na > Ca > Mg > Al Zn > Fe > Pb > Cu High reactivity Moderate reactivity Low reactivity According to above information which metal is extracted by Roasting, Calcination followed by reduction Ag > Au.

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