Question

From the metals-copper, iron, magnesium, sodium and zinc-select a different metal in each case which :
(a) does not react with dilute hydrochloric acid.
(b) can form 2⁺ and 3⁺ ions.
(c) has a hydroxide that reacts with both acids and alkalis.
(d) does not react with cold water, but reacts with steam when heated.

Answer 1

(a) Because copper is the least active among the given metals, it does not react with dilute hydrochloric acid.
(b) Iron can form 2⁺ and 3⁺ ions.
(c) Zinc forms a hydroxide, which is amphoteric in nature, as it reacts with both acids and alkalis.
(d) Zinc and iron are moderately reactive metals placed in the middle of the reactivity series. They do not react with cold water but react with steam.