MCQ
Which one of the following objects is ‘achiral’
- ALetter $P$
- BLetter $F$
- ✓Ball
- DA pair of hand

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$(I) 0.5\ mole$ of $O_3$ $(II) 0.5\ gm$ atom of oxygen $(III) 3.011 \times 10^{23}$ molecules of $O_2$ $(IV) 5.6\ litre$ of $CO_2$ at $STP$
