suddenly burning of a gas produce POP sound,indicate the presence of which gas?
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This test is most commonly used to identify hydrogen, which extinguishes with a distinctive 'squeaky pop' sound. Hydrogen is easily ignited, as it is flammable over a wide range of concentrations in air, making this test quite robust. If the gas is non-flammable, the burning splint will be extinguished.
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hydrogen is the gas that burns with a pop sound
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