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Metals and Non-metals (Class 10) — quick quiz

5 real SOF NSO questions on Metals and Non-metals (Class 10). Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 5

EASY

When a piece of iron is left exposed to moist air for several days, it gets covered with a reddish-brown coating. This process is called: