Which is not basic flux?

C a C O_{3}

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Lime

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S i O_{2}

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CaO

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Solution

The correct option is C $S i O_{2}$
Flux: The substance which is added to remove the gangue from concentrated ore in its molten state is called Flux and the substance formed with flux is called Slag. Slags are generally silicates.
$S i O_{2}$ is acidic flux whereas $C a C O_{3}$ , Lime and $C a O$ are basic flux.

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Similar questions

Q. Find the number of basic flux from the given compounds :

(

S i O_{2}, M g O, C a O, F e O, B_{2} O_{3}, C a C O_{3}, M g C O_{3}

)

Q. Find the number of compounds that form basic flux from the ones given below:

S i O_{2}, M g O, C a O, F e O, B_{2} O_{3}, C a C O_{3}

When copper pyrites is roasted in excess of air, a mixture of CuO + FeO is formed. FeO is present as impurity. This can be removed as slag during reduction of CuO. The flux added to form slag is

Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

.

Reason:

CaO

formed by decomposition of

{CaCO}_{3}

reacts with

{SiO}_{2}

to form slag.

Q. Calculate the weight of lime (

C a O

) obtained by heating

200 k g

of 95% pure lime stone (

C a {C O}_{3}

C a {C O}_{3} \to C a O + {C O}_{2}

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Which is not basic flux?

The correct option is C SiO2Flux: The substance which is added to remove the gangue from concentrated ore in its molten state is called Flux and the substance formed with flux is called Slag. Slags are generally silicates.SiO2 is acidic flux whereas CaCO3, Lime and CaO are basic flux.