Chemistry
Grade-8
Easy
Question
Pure hydrogen burns with air silently but the impure hydrogen gas burns in the air with ______.
- Non-explosively
- Pop sound
- Sooty flame
- Both B and C
Hint:
properties of hydrogen.
The correct answer is: Pop sound
Pure hydrogen burns with air silently but the impure hydrogen gas burns in the air with pop sound.
Hydrogen gas is a highly flammable gas and burns in air at a wide range of concentration between 4% and 75%. It forms explosive mixture with air if its concentration 4-74%. This mixture can be ignited by spark, heat or sunlight
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