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Chapter 8: Problem 16

Electromagnetic separation is employed for the concentration of those ores in which (a) the ore is magnetic (b) the gangue is magnetic (c) both the ore and the gangue are magnetic (d) either the ore or the gangue is magnetic

Short Answer

Expert verified
Answer: The electromagnetic separation technique can be employed for the concentration of ores when either the ore or the gangue is magnetic.

Step by step solution

01

Option (a) - The ore is magnetic

Electromagnetic separation can be employed when the ore is magnetic, as this allows the ore to be attracted to the magnetic field while the non-magnetic gangue remains unaffected. This option is a valid condition for the use of electromagnetic separation. However, let's check the other options as well.
02

Option (b) - The gangue is magnetic

In this case, the gangue is magnetic, which means that when a magnetic field is applied, it will be attracted towards it while the non-magnetic ore particles remain unaffected. Here, too, electromagnetic separation can be employed to separate the ore from the gangue. This condition also represents a valid condition for the use of electromagnetic separation.
03

Option (c) - Both the ore and the gangue are magnetic

If both the ore and the gangue are magnetic, applying a magnetic field wouldn't result in any separation, as both components would be attracted to the magnetic field. Therefore, this option is not a valid condition for the use of electromagnetic separation.
04

Option (d) - Either the ore or the gangue is magnetic

This option is a generalization of options (a) and (b), and it states that electromagnetic separation can be applied when either the ore or the gangue is magnetic. Since we have already established that options (a) and (b) represent valid conditions for employing electromagnetic separation, it's clear that option (d) is the correct answer. So, the correct option is: (d) either the ore or the gangue is magnetic

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Most popular questions from this chapter

One molecule of haemoglobin will combine with four molecules of oxygen. If \(1.0 \mathrm{~g}\) of haemoglobin combines with \(1.642 \mathrm{ml}\) of oxygen at body temperature \(\left(27^{\circ} \mathrm{C}\right)\) and a pressure of 760 torr, what is the molar mass of haemoglobin? (a) \(6,00,000\) (b) \(1,50,000\) (c) 15,000 (d) 60,000

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