Iron is removed from cahalcopyrite as

The Ellingham diagram for a number of metallic sulphide is reproduced below Iron is removed from chalcopyrite

A solenoid with an iron core and a bulb are connected to a d.c. source. How does the brightness of the bulb change when iron core is removed from the solenoid ?

A solenoid with an iron core and a bulb are connected to a d.c. source. How does the brightness of the bulb change, when the iron core is removed from the solenoid?

A solenoid with an iron core and a bulb are connected to a.d.c.source. How does the brightness of the bulb change, when the iron core is removed from the solenoid?

Iron is not extracted from iron pyrites. Explain the reason.

A constant current is maintained in a resistive solenoid having iron rod as its core. Which of the following quantities will change when iron rod is removed from solenoid?

How wrough iron is prepared from cast iron?