Question

1.when dilute HCl is added to zinc pieces taken in a test tube ?
(a)no change takes place.
(b)the colour of the solution becomes yellow.
(c)A pungent smelling gas gets liberated.
(d)small bubbles of H2 gas appear on the surface of zinc pieces. ?

Answer 1

When a metal react with acid it evolves hydrogen therefore small bubbles of hydrogen appear on the zinc pieces

Answer 2

Ahoy,


When dilute HCl is added to Zn pieces taken in a test tube
d) small bubbles of H2 gas appears on the surface of Zn.


This indicates that there is a reaction taking place b/w them.


cheers