Multiple choice

 Which of the following is the correct way to test for hydrogen gas?

  1. Bubble the gas through limewater

  2. Bubble the gas through universal indicator solution.

  3. the splint will burn brightly

  4. a squeaky pop test

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydrogen gas is tested by placing a lighted splint near the mouth of the test tube; if hydrogen is present, it burns with a characteristic squeaky pop sound.

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