Question

When we put burning candle near the mouth of test tube consisting of sulfuric acid & pieces of magnesium metal, why does it explore ?​

Answer 1

Answer:

"Flaming the mouth of a test tube creates an air flow. Hot air rises. Therefore dust/particles in the air are less likely to fall into your tube.

Therefore, it explodes...

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Answer 2

Answer:

Reaction of sulphuric acid and magnesium :

Mg+H2SO4 ➡MgSO4+H2

hydrogen gas is evolved from the test tube.

when we bring the candle near the mouth of the test tube,this hydrogen gas burns explosively in the presence of air with a ‛pop’ sound.

Explanation:

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