How could Zn act in response near NaOH to form Soodium Zincate even though Zn is a smaller quantity reactive metal than Sodium?

I was told that Zn when dropped into NaOH sol, It reacts to form Sodium Zincate. How is this possible, one a less reactive metal than Na how can Zn can displace Na from NaOH?
Answers:
So what!
Zn is not displacing Na. Being amphoteric its just combining near NaOH to produce Na2ZnO2.
The question of reactivity comes when displacement is likely to ensue.Here its not the case. So no question of reactivity.
Zinc is an example of a metal specifically called amphoteric; it can go any way. Aluminum does so also.

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