MCQ
Which of the following are produced from coal tar
- ASynthetic dyes
- BDrugs
- CPerfumes
- ✓All the three
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$2Zn + {O_2} \to 2ZnO;\Delta H = - 412\,J$
$(A)$ $\Delta G$ is positive $(B)$ $\Delta S _{\text {system }}$ is positive
$(C)$ $\Delta S _{\text {surroundings }}=0$ $(D)$ $\Delta H =0$