Question

When dilute HCL is added to zinc piece taken I test tube *

(1) No change take place

(2)The colour of the solution becomes yellow

(3)A pungent smelling gas gets liberated

(4)Small bubbles of Hydrogen Gas appear on the surface of zinc piece​​

Answer 1

Answer:

small bubbles of hydrogen gas appears

Explanation:

• HCL is an acid and zinc is a metal
• If a metal reacts with acid the result will be
• acid+ metal. corresponding salt + hydrogen gas

Answer 2

Answer: Small bubbles of Hydrogen Gas appear on the surface of zinc piece​​

Equation of reaction taking place :

$\sf\implies\:HCl\:(dil)\:+\:Zn\:(solid)\:\longrightarrow\:ZnCl\:(aq)\:+\:H_2\:(gas)$

Explanation : When hydrochloric acid is added to zinc granules then zinc chloride along with hydrogen gas is liberated . Due to formation of hydrogen gas bubbles will be appear on the surface of Zinc