Which of the following processes does not involve the use of limestone?

Chemistry

WAEC 2011

A. Extraction of iron in the blast furnance
B. Manufacture of tetraoxosulphate (VI) acid by Contact process
C. Production of washing soda by Solvay process
D. Production of cement

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Correct Answer: Option B

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Which of the following processes does not involve the use of limestone?

Correct Answer: Option B

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