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Asked by | 14 Jun, 2008, 04:06: PM
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The shiny brown coloured element  'X' is copper.Black coloured compound formed is copper oxide.(CuO)

Answered by | 27 Jun, 2008, 08:04: PM

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CBSE 10 - Chemistry
A chemical reaction in which exchange of ions occurs between the reactants, is known as: (A) Endothermic Reaction (B) Exothermic Reaction (C) Double Displacement Reaction (D) Displacement Reaction
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CBSE 10 - Chemistry
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CBSE 10 - Chemistry
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CBSE 10 - Chemistry
On heating blue coloured powder of Copper (I) Nitrate in a boiling tube, Copper Oxide (black), Oxygen gas and a brown gas X is formed (a) Write a balanced chemical equation of the reaction. (b) Identify the brown gas X evolved. (c) Identify the type of reaction. (d) What could be the pH range of the aqueous solution of the gas X ?
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CBSE 10 - Chemistry
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CBSE 10 - Chemistry
an iron metal compound 'Y', after decomposition changes into a solid brown substance and evolve a gas having characteristic odour of burning sulphur. Write the chemical reaction associated with this observation.
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