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Question

In the metallurgy of iron, when CaCO3 is added to blast furnace, calcium ion appears as:

A
CaO
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B
metallic Ca
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C
gangue
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D
slag
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Solution

The correct option is A slag
In the metallurgy of iron, when CaCO3 is added to blast furnace, calcium ion appears as slag.
Slag is formed in the zone of heat absorption.

Calcium oxide reacts with silica o form calcium silicate - a slag.

CaO+SiO2CaSiO3

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