A brown coloured copper powder was placed in a china dish and was strongly heated in air when a compound 'X' is formed. The compound 'X' was insoluble in water but dissolved in dilute hydrochloric acid forming a greenish solution without evolution of any gas. Try to answer the following questions based on the observations. (a) What is chemical formula and colour of compound X ? (b) Give chemical equation and category of the reaction involved. (c) How X forms green coloured solution ? (dSuggest method to get copper powder back from X. F luhle compound of calcium. On strong heating 'X' gives a colourless When Yis passed through lime water formed when
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