Which of the following statement is incorrect ?A. `FeSiO_(3)` is obtained as slag in the extraction of iron from haematite ore.B. In Hall`-` Heroult process, the electrolyte used in a molten mixture of alumina and cryolite.C. Lead is extracted form its chief ore galena by both carbon reduction as well as self reduction.D. Boron is obtained by thermal decomposition of `BI_(3)`.

Which of the following statement is incorrect ?A. `FeSiO_(3)` is obtai

1.	Which of the following statement is incorrect ?A. `FeSiO_(3)` is obtained as slag in the extraction of iron from haematite ore.B. In Hall`-` Heroult process, the electrolyte used in a molten mixture of alumina and cryolite.C. Lead is extracted form its chief ore galena by both carbon reduction as well as self reduction.D. Boron is obtained by thermal decomposition of `BI_(3)`.
Answer» Correct Answer - 1 `(1) " "FeSiO_(3)` is obtained as slag in the metallurgy of copper from pyrites. `(2)` Electrolysis is molten alumina dissolved in cryolite. (3)` 2PbS+3O_(2)rarr 2PbO+2SO_(2)` `PbS+2PbOrarr3Pb+SO_(2)("self reduction")," "PbO+C rarrPb+CO("carbon reduction")` `(4)" "2BI_(3)overset(Delta)rarr 2B+3I_(2)("Van Arkel method")`

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