Give the test for H2 gas...!!
Answers
Answer:
A simple test for the prescence of hydrogen gas is to light a splint and put it in the smoke present. If it makes a squeaky pop sound, then hydrogen gas is present. The hydrogen gas produced is combustible, and will therefore burn when it reacts with oxygen gas.
Answer:
Procedure :
Set the apparatus as shown in figure.
Take about 10 ml of dilute HCl in a test tube and add a few zinc granules to it.
We will observe the formation of gas bubbles on the surface of zinc granules.
Pass the gas being evolved through the soap water.
Gas filled bubbles are formed in the soap solution which rise into the air.
Bring a burning candle near the gas filled bubbles.
The gas present in a soap bubble burns with a ‘pop’ sound.
Result:
Only ‘hydrogen’ gas burns making a ‘pop’ sound.
So we will notice that gas evolved is { H }_{ 2 }.
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Additional Experiment:
Repeat the above experiment with H_{2}SO_{4} and HN{{O}_{3}}.
We observe the same observation of the HCl experiment.
Conclusion : From the above activities we can conclude that when acid reacts with metal, ${ H }_{ 2 }$gas is evolved.
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