MCQ
Oxidation number of carbon in $\ce{(CN)_2}$ is $.........$
- A$1$
- B$2$
- ✓$3$
- D$4$
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$I.$ $1$ molecule of oxygen
$II.$ $1$ atom of nitrogen
$III.$ $1 \times {10^{ - 10}}$ $g$ molecular weight of oxygen
$IV.$ $1 \times {10^{ - 10}}$ $g$ atomic weight of copper
| System $A$ | System $B$ |
| Temprature rise | Temprature remains same |
(at. mass $Ag =108; Br = 80$)
