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  9. Q79

BPSC (Bihar PCS) 2025 · Question 79 of 145

Which Compound is known as night glowing pigment from below?

Modern History

  1. ACopper Sulphide doped zinc oxide
  2. BEuropium doped strontium aluminateCorrect
  3. CBarium sulphate doped copper carbonate
  4. DBoron oxide doped copper sulphate

Answer: B. Europium doped strontium aluminate

Explanation

Europium-doped strontium aluminate is a phosphorescent compound that absorbs light during the day and glows in the dark at night, making it widely used as a night-glowing pigment in paints, watches, and safety signs. Therefore, option (B) is the correct answer.

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

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