A) \[Kl+{{l}_{2}}\to K{{l}_{3}}\]
B) \[KF+{{F}_{2}}\to K{{F}_{3}}\]
C) \[K{{B}_{r}}+lC{{l}_{2}}\to K\left[ BrlCl \right]\]
D) \[KF+Br{{F}_{3}}\to K\left[ Br{{F}_{4}} \right]\]
Correct Answer: B
Solution :
Due to the absence of d-orbitals \[n=\frac{0.222}{0.3}=0.74\] does not combine with\[t=n{{T}_{1/2}}=0.74\times 4.47\times {{10}^{8}}\] to form \[t=3.3\times {{10}^{8}}yr\] ion.
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