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General Knowledge :: General Science

  1. Which of the following metals remain in liquid for under normal conditions?

  2. A.
    Radium
    B.
    Zinc
    C.
    Uranium
    D.
    Mercury

  3. Potassium Permanganate is used for purifying drinking water, because

  4. A.
    it is a sterilising agent
    B.
    it dissolves the impurities of water
    C.
    it is a reducing agent
    D.
    it is an oxidising agent

  5. Which of the following is an element?

  6. A.
    Ruby
    B.
    Sapphire
    C.
    Emerald
    D.
    Diamond