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    Question

    Metalloids

    are
    A Alloys of alkali metals with other metals Correct Answer Incorrect Answer
    B Colloids of metals Correct Answer Incorrect Answer
    C Elements having some properties of both metals and non-metals Correct Answer Incorrect Answer
    D Metals heavier than lead Correct Answer Incorrect Answer

    Solution

    Metalloids, such as boron, silicon, and arsenic, exhibit properties that are intermediate between metals and non-metals. For example:

    • They can conduct electricity like metals but are brittle like non-metals.
    • They are often used in semiconductors. Options (a), (b), and (d) are incorrect because they do not describe metalloids.

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