The metal_____________ can react both with acid as well as alkalis.

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Solution

Zinc $(Zn)$ is amphoteric in nature i.e. it reacts with both acids and hot concentrated alkalis to form hydrogen and soluble salt.
Reaction with acids:
When zinc reacts with hydrogen chloride it forms zinc chloride and hydrogen gas.
$Zn + \underset{Hydrogen chloride}{HCl} \to \underset{Zinc chloride}{{ZnCl}_{2}} + H_{2} (↑)$
Reaction with base:
When zinc reacts with sodium hydroxide it forms sodium zincate and hydrogen gas.
$Zn + \underset{Sodium hydroxide}{2 NaOH} \to \underset{Sodium zincate}{{Na}_{2} {ZnO}_{2}} + H_{2}$
Therefore, the metal zinc can react both with acid as well as to alkalis.

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Similar questions

Q. Choose the correct answer:
The metal oxide which can react with acid as well as alkali is:
(a) Silver oxide
(b) Copper (II) oxide
(c) Aluminium oxide
(d) Calcium oxide

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(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.

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,

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

(e) Arrange the above metals in their decreasing order of reactivity.

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.

Q. Indicate if the following statements are true or false.
(a) Oxides of non-metals dissolve in water to form some acids.
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(c) Phosphoric acid is tribasic.
(d) Nitric acid can only form normal salts.
(e) Hydrochloric acid can form both carbonates and bicarbonate.
(f) Carbonic acid can form both carbonates and bicarbonates.
(g) Water of crystallisation is found in anhydrous salts.
(h) Litmus turns red in the presence of alkalis.
(i) An acid reacts with a carbonate to form a salt, and hydrogen gas is obtained.
(j) Acid taste sweet.
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(l) when metals react directly with acids, the reaction is called a displacement reaction.
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