Tests for Gases (+ 1 element)

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Last updated 6:17 AM on 8/9/26

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Ammonia (NH3)

turns damp red litmus paper blue

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Carbon dioxide (CO2)

gives a white ppt with limewater

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Hydrogen (H2)

‘pops’ with a lighted splint

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Oxygen (O2)

Relights a glowing splint

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Iodine (I2)

Gives a blue -black colour on addition of starch solution