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State one observation for each of the following:

(i) Copper sulphate solution is electrolysed using copper electrodes.

(ii) A small piece of zinc is added to dilute hydrochloric acid.

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(i) When copper sulphate solution is electrolysed using copper electrodes, reddish pink deposit of copper metal takes place on cathode.

(ii) Zn + 2HCl > ZnCl2 + H2

Zinc metal dissolves forming solution with the liberation of hydrogen gas which bums with blue flame and gets extinguished with pop sound.

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