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Limestone addition in the blast furnace is done to flux __________ present in the raw materials.

A. SiO2

B. Al2O3

C. MnO2

D. P

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  17. The bank of tubes located at the back of the domestic refrigerators are the __________ tubes.
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  20. Current employed in resistance welding ranges from __________ kVA/.
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  22. Metalloids
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