1.

Which of the following displacement occur:

Answer»

`Zn+2H^(+)toZn^(2+)+H_(2)UARR`
`Fe+2Ag^(+)TOFE^(2+)+Agdarr`
`Cu+Fe^(2+)toCu^(2+)+Fedarr`
`Zn+Pb^(2+)toZn^(2+)+Pbdarr`

ANSWER :A::B::D


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