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9. You might have noted that when copper powderis heated in a china dish, the surface of copperpowder becomes coated with a black coloursubstance.(a) How has this black coloured substanceformed?(b) What is that black substance?(c) Write the chemical equation of the reactionthat takes place.[CBSE 2011] |
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Answer» ⓣⓗⓐⓣ ⓑⓛⓐⓒⓚ ⓢⓤⓑⓢⓣⓐⓝⓒⓔ ⓘⓢ ⓒⓐⓡⓑⓞⓝ... ⓕⓞⓡⓜⓤⓛⓐ. ⓒ ⓕⓞⓡⓜⓔⓓ ⓑⓔⓒⓐⓤⓢⓔ ⓞⓕ ⓒⓔⓡⓣⓐⓘⓝ ⓡⓔⓐⓒⓣⓘⓞⓝⓢ ⓑⓔⓒⓐⓤⓢⓔ ⓞⓕ ⓗⓔⓐⓣ |
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