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How the detection of carbon and hydrogen compound? Explain with reaction |
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Answer» Solution :In organic compound the carbon and hydrogen are detected by heating the compound with copper (II) oxide. (i) Presence of carbon:Carbon present in the compound is oxidised to carbon dioxide (tested with lime -water, which develops turbidity). Reaction: `C + 2CuO RARR 2Cu + CO_(2(g))` `underset("Carbon dioxide")(CO_(2(g))) + underset("lime water")(CA(OH)_(2)) rarr underset("WHITE solid")(CaCO_(3(s))) + H_(2)O` (ii) Presence of hydrogen: The organic compound is heated with CuO and convert into hydrogen to water and tested with anhydrous copper sulphate, which turns blue. So this is a detection test of presence of hydrogen. `2H + CuO overset(Delta)rarr Cu + H_(2)O` `5H_(2)O + underset(underset("Copper sulphate")("White anhydrous"))(CuSO_(4)) rarr underset(underset("Copper sulphare")("Blue hydrated"))(CuSO_(4).5H_(2)O)` |
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