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The bond length is more in

$\begin{array}{1 1}(a)\;\text{H-H}\\(b)\;\text{D-D}\\(c)\;\text{T-T}\\(d)\;\text{Same in all}\end{array}$

Can you answer this question?

For 3 isotopes bond length is same.
Hence (d) is the correct answer.
answered Jan 22, 2014