Question

put burning candle near the mouth of test tube consisting sulphuric acid and pieces of magnesium metal why does it explode​

Answer 1

Answer:

the reaction of sulphuric acid and Magnesium metal is as follows:

Mg + H2SO4 ---> MgSO4 + H2

In this reaction, hydrogen gas is evolved from the test tube in this reaction.  and as 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.

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Answer 2

Explanation:

Answer. When we put a burning candle near the mouth of the test tube consisting of sulfuric acid and pieces of magnesium metal, it explodes due to the presence of hydrogen gas. Magnesium and sulfuric acid react to give magnesium sulfate and hydrogen gas.