Which two sets of reactants best represent the amphoteric character of Zn(OH) 2 ? Set 1 : Zn(OH) 2 (s) and OH – (aq) Set 2 : Zn(OH) 2 (s) and H 2 O(l) Set 3 : Zn(OH) 2 (s) and H + (aq) Set 4 : Zn(OH) 2 (s) and NH 3 (aq)

Zn OH 2 Acid + 2 OH - Base ⟶ ZnO 2 2 - Salt + 2 H 2 O Water Zn OH 2 Base + 2 H + Acid ⟶ Zn 2 + Salt + 2 H 2 O Water

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ChemistryComplete d-blockd-blockEasy2 minPYQ_2020

ChemistryEasysingle choice

Which two sets of reactants best represent the amphoteric character of Zn(OH)₂?

Set 1 : Zn(OH)₂(s)and OH^–(aq)

Set 2 : Zn(OH)₂(s) and H₂O(l)

Set 3 : Zn(OH)₂(s) and H⁺(aq)

Set 4 : Zn(OH)₂(s) and NH₃(aq)

Options:

Answer:

Solution:

$\underset{Acid}{Zn {(OH)}_{2}} + \underset{Base}{2 {OH}^{-}} ⟶ \underset{Salt}{{ZnO}_{2}^{2 -}} + \underset{Water}{2 H_{2} O}$

$\underset{Base}{Zn {(OH)}_{2}} + \underset{Acid}{2 H^{+}} ⟶ \underset{Salt}{{Zn}^{2 +}} + \underset{Water}{2 H_{2} O}$

Stream:NTA_ABHYASSubject:ChemistryTopic:Complete d-blockSubtopic:d-block

⏱ 2mℹ️ Source: PYQ_2020

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