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Draw a neat labelled diagram of liberation of co2 on heating caco3,liberation of no2 on decomposing ph[no3]2,liberation of hydrogen by displacement

reaction of zn and hcl reduction of copper oxide to cu
pleazzzz make it fast


No3) Zn + HCl gives ZnCl + H∨2
No1)CaCO∨3 gives CaO + CO∨2
reduction of copper oxide to copper is
CuO gives Cu + O∨2
0 0 0
no2 i think it's incomplete
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