Question

some wet iron wool was placed in a test tube. The test tube was inverted and kept ina beaker full of water. after few week it was noticed that the level of water in the test tube has risen. why did this happen​

Answer 1

Answer:

iron + oxygen → iron oxide

Explanation:

When iron rusts, water and oxygen in the air react with the iron to form iron oxide. In this experiment, students set up iron wool to rust in a test tube full of air, inverted in a beaker of water. As the iron wool reacts, rusts and removes the oxygen from the air, water is drawn up the tube. By observing the change in the volume of air in the tube, students can calculate the air’s oxygen concentration.