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Which of the ...

Question

Which of the following is used as acidic flux?

A

$C a O$

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B

$S i O_{2}$

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C

$A l_{2} O_{3}$

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D

$F e_{2} O_{3}$

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Solution

The correct option is B
$S i O_{2}$

With basic oxide impurities, acidic flux forms a slag.

$S i O_{2} + C a O ⟶ C a S i O_{3}$

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