For which type of metals Aluminothermic process is used for extraction of metals?

whose oxides are not easily reduced by carbon

The correct answer is 2. whose oxides are not easily reduced by carbon or hydrogen.

The aluminothermic process is a metallurgical process used to extract metals from their oxides. In this process, finely divided aluminum powder is mixed with the metal oxide and ignited. The aluminum reacts with the oxygen in the oxide to form aluminum oxide, releasing a large amount of heat. This heat melts the metal, which is then collected.

The aluminothermic process is used to extract metals whose oxides are not easily reduced by carbon or hydrogen. This is because aluminum is a very reactive metal and it can reduce even the most difficult-to-reduce oxides.

The other options are not correct. Weak bases are not necessarily difficult to reduce, and fusible oxides can be reduced by carbon or hydrogen.

Here are some examples of metals that are extracted using the aluminothermic process:

• Titanium
• Chromium
• Manganese
• Zirconium
• Vanadium