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Question

From the metals copper, iron, magnesium, sodium and zinc, select a different metal in each case which:
(i) does not react with dilute hydrochloric acid.
(ii) can form 2+ and 3+ ions.
(iii) has a hydroxide that reacts with both acids and alkalis.
(iv) does not react with cold water but reacts with steam when heated.
Arrange the metals in increasing order of reactivity.

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Solution

(i) Copper does not react with dilute hydrochloric acid.

(ii) Iron can form 2+ and 3+ ions.

(iii) Zinc has a hydroxide that reacts with both acids and alkalis.

(iv) Magnesium does not react with cold water but reacts with steam when heated.

(v) The increasing order of the metals as per their reactivity is as follows:

Copper < Iron < Zinc < Magnesium < Sodium


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