Which of the following is(are) burnt for producing SO₂ in the first step of the industrial preparation of sulphuric acid?

Iron oxide

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Iron pyrites

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Zinc blende

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Louisiana sulphur

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Solution

The correct options are
B
Iron pyrites

D
Louisiana sulphur

Either louisana sulphur or iron pyrites $(F e S_{2})$ due to its high percentage of sulphur is burnt in the first step of contact process

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