Purity of oxygen used for blowing in steel making L.D. converter is 99 – McqOptions

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1.	Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about __________ C.
A.	-53
B.	-103
C.	-183
D.	-196
Answer» D. -196

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