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Identify A to E and also explain the re...

Identify A to E and also explain the reactions involved.

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`A= Cu , B = Cu(NO_(3))_(2),C=[Cu(NH_(3))_(4)]^(2+),D= CO_(2),E= CaCO_(3) , F= Ca(HCO_(3))_(2)`
Reactions `: Cuco_(3) rarr CuO+CO_(2) , CuO+ CuS rarr underset((A))(Cu) + SO_(2)`
Reactions `:` `Cu+ 4HNO_(3)("conc.")rarrunderset((B))(Cu(NO_(3))_(2))+ 2NO + 2H_(2)O`
`underset((B))(Cu^(2+))+4NH_(3) rarr underset ((E ))(CaCO_(3))+H_(2)O`
`CaCO_(3) +H_(2)O+ CO_(2) rarr underset((F))(Ca(HCO_(3))_(2))`
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