Among $Cu, Fe, Mg, Na, and Zn,$ select a different metals in each case, which
(a) Does not react with dilute $HCl$ .
(b) Forms $2^{+}$ 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.

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Solution

Metals are arranged in their decreasing order of reactivity is called reactivity series.
$K > Na > Ca > Mg > Al > Zn > Fe > Pb > H > Cu > Ag > Pt > Au$
(a) From the reactivity series, $Cu$ is present below hydrogen which shows less reactivity of copper.
So, $Cu$ does not react with dilute $HCl$ .
(b) $Mg$ is an alkaline earth metals having a general electronic configuration ${ns}^{2}$ that shows maximum oxidation state $+ 2$ and forms $1 +$ and $2^{+}$ ions. Other metals show different oxidation states and forms $2^{+}$ and $3^{+}$ ions.
$Mg (s) - 2 e^{-} \to {Mg}^{2 +}$
$Na$ belongs to alkali metals having a general electronic configuration ${ns}^{1}$ and forms $1 +$ ion only.
$Cu, Fe and Zn$ belongs to the first transition series having a general electronic configuration $3 d^{1 - 10} 4 s^{1 - 2}$ forms $+ 1, + 2, + 3, + 4, + 5, + 6$ ions.
(c) Oxides of metals react with water to give bases.
Among the given metals, the oxide of zinc $(ZnO)$ is amphoteric in nature shows acidic and basic nature.
$Zn {(OH)}_{2} (s) + HCl (aq) \to {ZnCl}_{2} (aq) + H_{2} O (l) base Zn {(OH)}_{2} (s) + KOH (aq) \to K_{2} Zn {(OH)}_{4} (aq) + H_{2} O (l) lewis acid$
Hence, $Zn$ hydroxides react with both acids and alkalis.
(d) Metals $Fe, Zn$ does not react with cold water but react with steam when heated to produce metal oxide and hydrogen given by reactivity series.
$3 Fe (s) + 4 H_{2} O (g) \to {Fe}_{3} O_{4} (s) + 4 H_{2} (g) Zn (s) + H_{2} O (g) \to ZnO (s) + H_{2} (g)$

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Q. 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.
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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.
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(iv) does not react with cold water but reacts with steam when heated.
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(a) does not react with dilute hydrochloric acid,

(b) can form $2^{+}$ and $3^{+}$ ions,

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

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Among Cu,Fe,Mg,Na,andZn, select a different metals in each case, which(a) Does not react with dilute HCl.(b) Forms 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.

Among $Cu, Fe, Mg, Na, and Zn,$ select a different metals in each case, which
(a) Does not react with dilute $HCl$ .
(b) Forms $2^{+}$ 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.