Home Chemistry Classification of Elements and Periodicity Mix Which of the following is correct order of s…
Chemistry Classification of Elements and Periodicity Mix Single Correct MCQ
Published on: August 13, 2026

Which of the following is correct order of stability :

A
Tl 3+ > Bi 3+
B
PbO 2 > PbO
C
Tl +1 < Tl +3
D
Sn 2+ = Ge 2+

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The correct answer is:
C

BiI 5 does not exists because of I – being very strong reducing agent. So it reduces Bi 5+ to Bi 3+ and forms BiI 3 .

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