Question

    Naphthalene balls, commonly used as a pest repellent,

    are derived from which source?
    A Carbon Correct Answer Incorrect Answer
    B Wood Correct Answer Incorrect Answer
    C Coal Tar Correct Answer Incorrect Answer
    D Coal Gas Correct Answer Incorrect Answer

    Solution

    Naphthalene balls are made from coal tar and are used as insecticides and pest repellents, especially against moths and cockroaches. The chemical formula of naphthalene is C₁₀H₈.

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