First slide

General methods of extraction of elements from the earth crust

Question

H₂ is not widely used as the reducing agent in metallurgical process because

Moderate

A

Many metals react with H₂ at elevated temperature forming hydrides
B

There is a risk of explosion from H₂ and O₂ present in the air
C

Reducing power of H₂ does not increase with temperature
D

Reducing power of H₂ increases with temperature

Solution

Reducing power of hydrogen and T has no role or connectivity.

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