When dilute HCl is added to zinc pieces taken in a test tube :
(1)The colour of the solution becomes yellow.
(2)A pungent smelling gas gets liberated.
(3)No change takes place.
(4)Small bubbles of H2, gas appears on the surface of zinc pieces.
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Answer:
HCl+Metal=metal salt + h2 gas
therefore answer is .
4)Small bubbles of H2, gas appears on the surface of zinc pieces.
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