Question

How you will test gas evolved in any reaction is hydrogen gas ?

Answer 1

To test hydrogen gas evolved, insert a lighted splint into the test tube. The lighted splint should extinguish with a characteristic "pop" sound. This helps to test hydrogen gas evolved.



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Answer 2

for checking that in any reaction h2 gas is evolved we can bring a burning match stick near mouth of test tube; if it burst with pop sound so the h2 gas is evolved