Question
Which one of the following has largest ionic radius?
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$mA + nB + pC \to m' X + n 'Y + p 'Z$
obey the rate expression as $\frac{{dX}}{{dt}} = k{[A]^m}{[B]^n}$.
Reason : The rate of the reaction does not depend upon the concentration of $C$.


$(i)$ $0.10\, \mathrm{M} \,\mathrm{Ba}_{3}\left(\mathrm{PO}_{4}\right)_{2}$ $(ii)$ $0.10\, \mathrm{M}\, \mathrm{Na}_{2} \mathrm{SO}_{4}$ $(iii)$ $0.10\, \mathrm{M}\, \mathrm{KCl}$ $(iv)$ $0.10 \,\mathrm{M} \,\mathrm{Li}_{3} \mathrm{PO}_{4}$