MCQ
In a electrochemical cell
- APotential energy changes into kinetic energy
- BKinetic energy changes into potential energy
- ✓Chemical energy changes into electrical energy
- DElectrical energy changes into chemical energy
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${C_({graphite)}} + {O_2} \to C{O_2};\,\Delta H = - 393.4\,kJ/mole$
${C_({graphite})} \to {C_{{\rm({diamond})}}};\,\Delta H = $
$(V=33\, volt)$ $(m_p = 1.672 \times 10^{-27} \,kg)$
| $[R]$ (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