MCQ
Primary battery is a battery:
- Awhich can be recharged.
- Bwhich cannot be reconditioned by replacing chemical.
- Cwhich cannot be reused.
- ✓which cannot be recharged.
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$(I)$ $ Ph -COCH_3$
$(II)$ $CH_3 -CO -CH_3$
$(III)$ $CH_3 -CHO$
$(IV)$ $Ph -COCH_2 -CH_3$