Hold anhydrous copper sulfate or anhydrous cobalt chloride >>> paper turns from white to blue/blue to pink

Hold pieces of damp litmus paper in mouth of the test tube >>> paper turns from blue to red

Bubble gas through limewater >>> limewater goes milky

Tests For Gases Flashcards by Ishika Ali

Water vapour

Hold anhydrous copper sulfate or anhydrous cobalt chloride&raquo_space;> paper turns from white to blue/blue to pink

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Nitrogen dioxide

Hold pieces of damp litmus paper in mouth of the test tube&raquo_space;> paper turns from blue to red

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Oxygen

Lighted splint in test tube will relight

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Carbon dioxide

Bubble gas through limewater&raquo_space;> limewater goes milky

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