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Iron, aluminium and zinc do not react with cold or hot water, but they do react with
Akerosene
Bsteam
Ccold water only
Dnone of these
Answer & Solution
Correct answer: B. steam
1. These moderately reactive metals are unreactive towards cold and hot water.
2. They react with **steam** to give the metal oxide and hydrogen, e.g. 3Fe + 4H₂O(g) → Fe₃O₄ + 4H₂.
3. Less reactive metals (Cu, Ag, Au) do not react even with steam.
_Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch3 'Metals and Non-metals', §3.2.2_
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