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Which tow sets of reactants best represe...

Which tow sets of reactants best represents the amphoteric character of `Zn(OH)_(2)` ?
I. `Zn(OH_(2))(S) and OH^(-)(aq)`
set 2. : `Zn(OH)_(2)(s) and H_(2)O(1)`
Set 3 : `Zn(OH)_2(s) and NH_(3)(aq)`

A

1 and 2

B

1 and 3

C

2 and 4

D

3 and 4

Text Solution

Verified by Experts

The correct Answer is:
B
`{:(Zn(OH)_(2) + 2OH^(-) rarr ZnO_(2)^(2) + 2H_(2)O),(" Acid " " Acid " " Salt " " Water" ):}`
`underset("Base")(Zn(OH)_2) + underset("Acid")(2H^+)rarr underset("Salt")(Zn^(2+))+underset("Water")(2H_(2)O)`
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