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  9. Q80

BPSC (Bihar PCS) 2025 · Question 80 of 145

Which Material is used for smart film?

Miscellaneous

  1. ACalcium carbonate
  2. BIndium tin oxideCorrect
  3. CZinc chloride
  4. DSilica

Answer: B. Indium tin oxide

Explanation

Smart films, also known as electrochromic or switchable films, use a thin Indium Tin Oxide (ITO) coating. ITO is a transparent conductive oxide that enables the film to toggle between transparent and opaque states when an electric current is applied.

Source: 71st BPSC CCE Prelims 2025 (Set H)

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