Alex labelled four vessels as W X Y and Z and kept them in a humid atmosphere he came back after a few weeks to observe the changes in the vessels he noted his observation in a table as follows
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Answer:
y
Explanation:
iron is a metal which is covered with a brown coating on its surface due to the process of rusting
so in order to prevent the iron articles from rusting the process of galvanisation is used in which zinc coating is done on the surface of iron articles so that the iron article protected from Rust
hope it's help you