Take water in a test tube add a few drops of litmus to it. With the help of a straw, blow air into the solution. It turns red. Explain the reason behind the colour change. Please answer fast !!!!!!!!

When we are blowing air in the test tube, we are blowing CO2 (Carbondioxide), the carbondioxide reacts with the water (H2O) in the test tube and forms Carbonic Acid (H2CO3), which is acidic in nature and hence the change in colour from blue to red. Since acids turn blue litmus to red

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