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    Question

    Which one of the following is not a colloid ?

    A Blood Correct Answer Incorrect Answer
    B Vinegar Correct Answer Incorrect Answer
    C Smoke Correct Answer Incorrect Answer
    D More than one of the above Correct Answer Incorrect Answer
    E None of the above Correct Answer Incorrect Answer

    Solution

    Explanation: Colloids are mixtures where particles of one substance are dispersed throughout another but are not dissolved. Vinegar is primarily a solution of acetic acid in water, making it a true solution rather than a colloid. Blood contains suspended cells and proteins, qualifying as a colloid. Smoke consists of solid particles dispersed in air, which is also a colloid.

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