Q.

In what ratio are iron ore, limestone, and coking coal required to make steel?

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a

 4:2:1

b

2:4:1

c

1:2:4

d

2:1:4

answer is A.

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Detailed Solution

Explanation - The ratio of iron ore, limestone and coking coal used is 4:2:1. Pig iron is mixed with manganese, chromium, and nickel to make other steel forms like stainless steel, Carbon Steel, alloy steel, etc.

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