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Small amounts of _____________ and __________ improve the quality of Bessemer pig.

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Small amounts of _____________ and __________ improve the quality of Bessemer pig.

(a) Copper and sulphur

(b) Silicon and phosphorus

(c) Silicon and manganese

(d) Phosphorus and sulphur

The question was asked in a national level competition.

Asked question is from Ferrous Metals in chapter Air Conditioning, Thermal Insulation, Stones & Ferrous Metals of Construction & Building Materials

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Right choice is (c) Silicon and manganese

The explanation is: Small amounts of silicon and manganese improve the quality of Bessemer pig. However, it should be free from phosphorus, copper and sulphur.

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