Explain why (a)Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not? (b) We store silver chloride in dark coloured bottles?
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1. zinc comes before hydrogen in reactivity series so it liberates hydrogen , where as copper comes after hydrogen so it can't liberate hydrogen.
2. silver chloride is a colouress liquid so it is good to keep them in dark coloured bottle.
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