MCQ
Rubber is hardened for making tyres by:
- AAdding $\mathrm{H}_2$
- ✓Adding carbon black
- CSaturating it
- DAll of the above
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| $[R]$ (molar) | $1.0$ | $0.75$ | $0.40$ | $0.10$ |
| $\mathrm{t}$ (min.) | $0.0$ | $0.05$ | $0.12$ | $0.18$ |
The order of the reaction is
