AQAD - A-Question-A-Day

Karan stuck steel wool (small iron wires) to the bottom of a test-tube and inverted it into a water container as shown in the figure. After about 10 days, the steel wool had rusted.


Iron + Oxygen (from air) + Water --> Rust






Assuming that no water evaporated, which figure BEST represents the water level in the test-tube?

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