Q.

Correct boiling point order is

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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
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