MCQ
Which of the following ionic radius would be maximum
- ✓${C^{4 - }}$
- B${N^{3 - }}$
- C${O^{2 - }}$
- D$M{g^{2 + }}$
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$(I)$ $Na_2O_2$
$(II)$ $O_2 [AsF_6]$
$(III)$ $CsO_2$
$(IV)$ $O_2$
$(i)$ $C{H_3} - C \equiv C - C{H_3}$
$(ii)$ $C{H_3} - C{H_2} - C{H_2} - C{H_3}$
$(iii)$ $C{H_3} - C{H_2} - C \equiv CH$
$(iv)$ $C{H_3} - CH = C{H_2}$

$n - Bu -\equiv\frac{(i) n-BuLi,n - C _{5} H _{11} Cl}{(ii) Lindlar\,\, cat, H _{2}}$