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State one appropriate observation for the following:(i) When dilute hydrochloric acid is added to sodium carbonate crystals.(ii) At the anode when aqueous copper sulphate solution is electrolysed using copper electrodes.(iii) Zinc nitrate crystals are strongly heated.(iv) Ammonium hydroxide solution is added in excess to Zinc nitrate solution.(v) Bromine vapours are passed into a solution of ethyne in Carbon tetrachloride. |
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