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Which of the following gases emits red light when electricity is passed through it? **(SSC CGL 2024, Tier-I, General Awareness, 12 Sep Shift 2, Q13)**

1. Which of the following gases emits red light when electricity is passed through it? **(SSC CGL 2024, Tier-I, General Awareness, 12 Sep Shift 2, Q13)**

 

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