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Dilute hydrochloric acid is added to granulated zinc taken in a test tube.

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Dilute hydrochloric acid is added to granulated zinc taken in a test tube. The following observations are recorded. Point out the correct observation.

(a) The surface of metal becomes shining

(b) The reaction mixture turns milky

(c) Odour of a pungent-smelling gas is recorded

(d) A colourless and odourless gas is evolved

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(d) Zinc metal reacts with dil. HCl to form zinc chloride and bubbles of colourless and odourless hydrogen gas is evolved.

Zn(s) + 2HCl(aq) + ▵ → ZnCl2(aq) + H2(g)

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