Question

Why is the purpose of lime water in test tube B ?​

Answer 1

Answer:

for production of bubbles (oxygen is taken out)

Explanation:

Answer 2

Explanation:

If carbon dioxide is bubbled through limewater then it turns from clear to cloudy/milky in colour. This is why limewater used in a simple respirometer can show that more carbon dioxide is present in exhaled air compared to inhaled air. ... Breathing out through the mouthpiece bubbles exhaled air through tube B.