NTA Abhyas JEE Main2020Chemistryd and f Block ElementsPractice
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)
Options
- A1 and 2
- B1 and 3
- C2 and 4
- D2 and 3
Correct answer
B. 1 and 3
Step-by-step solution
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