Which of the following is not a basic flux-CaCO-3Ca-OH-2SiO-2CaO

The correct option is C SiO_2Flux is a substance that is added to the ore nbsp;to remove impurities (gangue) from it. It reacts with gangue to form slag. If ...

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Standard X

Chemistry

Smelting

Which of the ...

Question

Which of the following is not a basic flux?

{CaCO}_{3}

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{Ca(OH)}_{2}

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{SiO}_{2}

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CaO

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Solution

The correct option is C ${SiO}_{2}$
Flux is a substance that is added to the ore to remove impurities (gangue) from it. It reacts with gangue to form slag.
If the gangue is a acidic substance, basic substance is used as flux and vice versa.
In the above options only ${SiO}_{2}$ is an acidic flux whereas, remaining are basic flux.

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