Question

When a metal is to be extracted from its ore, if the gangue associated with the ore is silica, then.

• A. An acidic flux is needed
• B. A basic flux is needed
• C. Both acidic and basic flux are needed
• D. Neither of them is needed

Answer 1

Answer: (B)

A basic flux is needed

Answer 2

$\underset { \text { Acidic impurity } } { \mathrm { SiO } _ { 2 } } + \underset { \text { Basic flux } } { \mathrm { CaO } } \rightarrow \underset { \text { Slag } } { \mathrm { CaSiO } _ { 3 } }$