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Polyaniline and its analogs are used in LEDs. Which properties of the polymer accounts for this application?

Polyaniline and its analogs are used in LEDs. Which properties of the polymer accounts for this application? Correct Answer Electrochromic and Chemochromic

Polyaniline can change its color on application of particular voltage and suitable chemicals. So it is Electrochromic and Chemochromic. These properties make it useful for LEDs.

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