The self-reduction process, also known as auto-reduction, involves the reduction of ores without the use of any external reducing agent. The ores reduce themselves using the oxygen present in the ore itself.

The metals that are usually extracted by the self-reduction process include:

1. Mercury
2. Copper
3. Lead
4. Silver

These metals have their ores like cinnabar (HgS), copper glance (Cu2S), galena (PbS), and argentite (Ag2S) which are sulphide ores. These sulphide ores are heated in air to convert them into their oxides, and then further heated in the absence of air where they undergo self-reduction.

For example, in the case of copper, copper glance (Cu2S) is first heated in air to convert it into copper (I) oxide (Cu2O). This copper (I) oxide is then heated in the absence of air where it reacts with the remaining copper (I) sulphide (Cu2S) to give copper metal.

2Cu2S + 3O2 → 2Cu2O + 2SO2
Cu2O + Cu2S → 6Cu + SO2

So, the answer to your question is Mercury, Copper, Lead, and Silver.

Question

The self-reduction process, also known as auto-reduction, involves the reduction of ores without the use of any external reducing agent. The ores reduce themselves using the oxygen present in the ore itself.

The metals that are usually extracted by the self-reduction process include:

1. Mercury
2. Copper
3. Lead
4. Silver

These metals have their ores like cinnabar (HgS), copper glance (Cu2S), galena (PbS), and argentite (Ag2S) which are sulphide ores. These sulphide ores are heated in air to convert them into their oxides, and then further heated in the absence of air where they undergo self-reduction.

For example, in the case of copper, copper glance (Cu2S) is first heated in air to convert it into copper (I) oxide (Cu2O). This copper (I) oxide is then heated in the absence of air where it reacts with the remaining copper (I) sulphide (Cu2S) to give copper metal.

2Cu2S + 3O2 → 2Cu2O + 2SO2
Cu2O + Cu2S → 6Cu + SO2

So, the answer to your question is Mercury, Copper, Lead, and Silver.

Knowee AI · Accepted Answer

The self-reduction process, also known as auto-reduction, involves the reduction of ores without the use of any external reducing agent. The ores reduce themselves using the oxygen present in the ore itself.

The metals that are usually extracted by the self-reduction process include:

1. Mercury
2. Copper
3. Lead
4. Silver

These metals have their ores like cinnabar (HgS), copper glance (Cu2S), galena (PbS), and argentite (Ag2S) which are sulphide ores. These sulphide ores are heated in air to convert them into their oxides, and then further heated in the absence of air where they undergo self-reduction.

For example, in the case of copper, copper glance (Cu2S) is first heated in air to convert it into copper (I) oxide (Cu2O). This copper (I) oxide is then heated in the absence of air where it reacts with the remaining copper (I) sulphide (Cu2S) to give copper metal.

2Cu2S + 3O2 → 2Cu2O + 2SO2
Cu2O + Cu2S → 6Cu + SO2

So, the answer to your question is Mercury, Copper, Lead, and Silver.

Which of the following metal(s) is (are) extracted by self-reduction process?

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