Consider the following statements : Statement-I: Poling process is used for the refining of copper and lead. Statement-2: The scavenger which is used in the manufacture of steel is manganese. Statement-3: The chemical composition of matte is
${Cu}_{2} O + {Cu}_{2} S$
Statement-4: In the extraction of aluminium from alumina ${Al}_{2} O_{3}$ undergoes dissociation. And arrange in the order of true/false.

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TT FT

F T F F

FF TT

TT F F

answer is A.

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Detailed Solution

When iron ore is transformed into iron, manganese eliminates oxygen and Sulphur. It is also an important alloy in the transformation of iron into steel. As an alloy, it reduces steel brittleness while increasing strength. Hence the scavenger which is used in the manufacture of steel is manganese.

Statement A is correct. While the other given options are incorrect.

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