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Chemistry Test ...

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  • Question 1
    4 / -1

    The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due to high concentration of :

  • Question 2
    4 / -1

    The most powerful oxidant among the following is

  • Question 3
    4 / -1

    The species which can best serve as an initiator for the cationic polymerization is :

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