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Chemistry Easy PPSC NTS Uploaded: 14 Jul 2026

Which noble gas is used in glowing advertising signs giving a reddish-orange colour?

  • A Argon
  • B Helium
  • C Neon
  • D Krypton
Correct Answer: Option C — Neon
Explanation:
Neon gas is used in neon signs and emits a characteristic reddish-orange glow when electricity passes through it due to the excitation of its electrons.
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