MCQ
The oxide which cannot act as a reducing agent is
- A$S{O_2}$
- B$N{O_2}$
- ✓$C{O_2}$
- D$Cl{O_2}$
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$(I)$ They have high melting points, higher than those of pure metals
$(II)$ They are very hard
$(III)$ They retain metallic conductivity
$(IV)$ They are chemically more reactive than the pure metals
