# 1) which of the following metals corrode easily a. gold, b. silver, c. nickel, d. iorn ​2) which gas is produced by the reaction of metals with acid? a. oxygen , b.hydrogen, c. carbon dioxide , d.nitrogen 3) what does the surface of a metal turn in to when it corrodes? a. a compound, b. a mixture, c. an element, d.none of these

Dear student

1. The correct option is D. Iron corrodes most easily.

2. When metals react with acids, hydrogen gas is produced, for example, when Zn reacts with sulphuric acid, Zinc sulphate is produced and hydrogen gas is released.
Zn + H2SO4  $\to$ ZnSO4 + H2

​Kindly post remaining queries in separate threads.

Regards

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1.D)
2.B)
3.A)

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