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    Question

    What is the chemical formula of pop (plaster of Paris)?

    A CaSO4. 2H2O Correct Answer Incorrect Answer
    B NaHCO₃ Correct Answer Incorrect Answer
    C Ca3(PO4)2 Correct Answer Incorrect Answer
    D Na₃PO₄ Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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