Question

how will you test whether a given rod is made of iron or not

Answer 1

A magnet is an object which attracts pieces of iron, steel, nickel and cobalt. This usually has two poles that is north pole and a south pole.

If the rod has the power to attract and has two poles then it is a magnet.

Answer 2

If we drop a bottle of water on the iron rod it gets rusted fastly. In this way we can find weather the rod is iron or not