Fill in the blanks choosing appropriate word/ words from those given in the brackets : (gravity separation, magnetic separation, absence, presence, `CuFeS_2`, `Cu_2S`, froth flotation, aluminium, iron, smelting, pure, impure, mines, copper, silver, sulfide, zinc, chromium nickel, tin, blister copper, Cus, Fes, thermal, electrical, argentite or silver glance `(Ag_2S)`, cuprous oxide, cuprous sulfide.)
The main ore of silver is.......

Explanation

To solve the question, we need to identify the main ore of silver from the options provided in the brackets.

1. **Understanding the Question**: The question asks for the main ore of silver. An ore is a naturally occurring solid material from which a metal or valuable mineral can be extracted profitably.

2. **Identifying Silver Ores**: The two common ores of silver are:
- Argentite (Ag₂S)
- Other ores like galena (PbS) can also contain silver but are not primarily silver ores.

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