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What is the concentration of zinc in calamine?

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in Chemistry – Class 12 by (188k points)
What is the concentration of zinc in calamine?

(a) 98 percent

(b) 94 percent

(c) 86 percent

(d) 74 percent

I had been asked this question during an internship interview.

I want to ask this question from Occurrence of Metals topic in portion General Principles and Processes of Isolation of Elements of Chemistry – Class 12

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The correct answer is (a) 98 percent

Explanation: The chemical composition of calamine is ZnCO3 with 98 percent concentration of zinc. It is available in abundance and can be artificially prepared in laboratories. It is used in medication to relieve pain and itching.

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