1.

When zinc pieces are added to concentrated NaOH solution, H_(2(g)) is formed along with

Answer»

`Na_3ZnO_2`
`Na_2ZnO_2`
`Na_4ZnO_2`
`Na_2ZnO_3`

Solution :`Zn_((s)) + 2NaOH_((aq)) to UNDERSET"Sodium Zincate" (Na_2ZnO_(2(aq)))+ H_(2(g))`


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