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Acid
Acid
Acid
Base
Base
Base
Salt
Salt
Salt
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1. HCN + NaOH → NaCN + H
2
O
2. CuO + H
2
SO
4
→ CuSO
4
+ H
2
O
3. Ca(OH)2 + 2HCI → CaCI
2
+ 2H
2
O