(b) Write balanced chemical equations for each of the following:
# Action of concentrated sodium hydroxide on Zinc oxide,
# Action of dilute hydrochloric acid on iron,
# Action of concentrated nitric acid on copper
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Answer:
# 2 NaOH[Conc.] + ZnO ----> Na2ZnO2 + H2O
# 2HCl[Dil.] + Fe ----> FeCl2 + H2
# 8 HNO3 + 3 Cu ----> 3 Cu(NO3)2 + 2 NO + 4 H2O