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An Intiative by Sri Chaitanya
a
O < S < Se < Po < Te
b
O < S < Se < Te < Po
c
O < Po < Se < Te < S
d
O < S < Te < Se < Po
answer is A.
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Detailed Solution
Due to lanthanoid ContractionA) Metallic bonds in Polonium are weakB) Inter atomic attractions in Polonium are weakC) M.P and B.P of 'Po' are lesser than that of Te O < S < Se < Po< Te