Question

    Which instrument is primarily used to measure the relative density of liquids by utilizing the principle of buoyancy?

    A Hygrometer Correct Answer Incorrect Answer
    B Hydrometer Correct Answer Incorrect Answer
    C Lactometer Correct Answer Incorrect Answer
    D Barometer Correct Answer Incorrect Answer

    Solution

    - Hygrometer: Measures humidity in the atmosphere.  - Hydrometer: Measures the relative density (specific gravity) of liquids based on buoyancy.  - Lactometer: Measures the density of milk to determine its purity.  - **Barometer:** Measures atmospheric pressure.

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