71st BPSC Prelims (2025), question 133

🔬 Science & Technology

  1. Which material is used for smart film?

    1. Indium tin oxide
    2. Calcium carbonate
    3. Zinc chloride
    4. Silica
    Show answer

    Answer: A — Indium tin oxide

    Indium tin oxide, a transparent conductor, is used in smart (electrochromic) films.

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