Physical and chemical changes in NaOH and Zn versus Zn and HCl

[krateesh]

Homework Statement

What are the physical and chemical changes that occur when NaOH and Zn react.?Also how do this reaction differ from the reaction of Zn and HCl?

Homework Equations

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The Attempt at a Solution

I do know that zincate is formed in the first and H2 is evolved in the second .But as i have no time to go and perform in the lab...thus please tell me about the colour changes of solution,any deposition,cause and effect of these reactions.

 

[Bystander]

Hydrogen evolves in both. Base results in zincate formation as a consequence of the amphoteric nature of the hydrated zinc ion.