MCQ
The correct order of radii is
- A$N < Be < B$
- ✓${F^ - } < {O^{2 - }} < {N^{3 - }}$
- C$Na < Li < K$
- D$F{e^{3 + }} < F{e^{2 + }} < F{e^{4 + }}$
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How many structural isomers are possible when one of the hydrogens is replaced by a chlorine atom?

(Where $a _{0}=$ Bohr radius $52.9 pm$ ) is $km s ^{-1}$
(Given : Mass of electron $=9.1 \times 10^{-31} kg$, Planck's constant $h =6.63 \times 10^{-34} \;Js$ )