When an electric current passes through a low- pressure gas in a tube, the gas atoms are excited and emit light as they return to their ground state. Different gases emit light of characteristic wavelengths (colors). Neon gas specifically emits a bright reddish-orange light when used in discharge tubes, famously known as "neon signs."
Which one of the following gases produces a red light when electricity flows through it ?
Asked in UPSC CAPF 2020 · Topic: Sulphur, Nitrogen, Halogen, Inert Gases (Inert Gases (Noble Gases): Occurrence, isolation, general characteristics, and uses)
More Chemistry questions
- The original copies of the Constitution of India are kept in the Parliament library in cases filled with which one of the following inert gases?
- Which one of the following Noble Gases is not present in air?
- The gases employed for respiratory activities of divers are
- Divers uses which gas along with Oxygen in sea:
- Identify the chemically inactive or noble gas from the following: A) Oxygen B) Hydrogen C) Argon D) Carbon-dioxide
- The mass of 0.5 mole of N₂ gas is
- Chips bags contain which gas ?
- Identify the pair of compounds from the pairs of molecules given below : - (5) Question not attempted
