下列反应中,氧化剂与还原剂的物质的量之比为2 :1的是 ( )
A.Zn + 2HCl = ZnCl2 + H2↑ |
B.Cu +2 H2SO4(浓) = CuSO4 + SO2↑+ 2H2O |
C.3S + 6NaOH = 2Na2S + Na2SO3 + 3H2O |
D.2Na + Cl2 = 2NaCl |
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下列反应中,氧化剂与还原剂的物质的量之比为2 :1的是 ( )
A.Zn + 2HCl = ZnCl2 + H2↑ |
B.Cu +2 H2SO4(浓) = CuSO4 + SO2↑+ 2H2O |
C.3S + 6NaOH = 2Na2S + Na2SO3 + 3H2O |
D.2Na + Cl2 = 2NaCl |