Engineering Materials
Neutral solution is one which has pH value

Equal to 7
Less than 7
Greater than 7
pH value has nothing to do with neutral solution

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Engineering Materials
The charge of the blast furnace consists of

Calcined ore, coke and limestone all in equal parts
Calcined ore (8 parts), coke (4 parts) and limestone (1 part)
Calcined ore (1 part), coke (8 parts) and limestone (4 parts)
Calcined ore (4 parts), coke (1 part) and limestone (8 parts)

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Engineering Materials
Free carbon in iron makes the metal

Soft and gives a fine grained crystalline structure
Soft and gives a coarse grained crystalline structure
Hard and gives a coarse grained crystalline structure
Hard and gives a fine grained crystalline structure

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