3. Which one of these is correct?
(a) Formation of metal oxide under the suitable conditions is called rusting
(b) Gold, silver and platinum are examples of noble metals.
(c) Iron is used for construction of railways and bridges.
(d) All of these.
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Answer: (d) All of these.
The answer is 100 % correct.
Mark as brainliest if your doubt is cleared.
Have a phenomenal future!
JAI HIND
The answer is 100 % correct.
Mark as brainliest if your doubt is cleared.
Have a phenomenal future!
JAI HIND
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