JEE Mains · Chemistry · STD 11 - 4. Chemical bonding and molecular structure
In which of the following pairs of molecules/ions, both the species are not likely to exist?
- A \(H_{2}^+, He_2^{2-}\)
- B \(H_{2}^-, He_2^{2-}\)
- C \(H_{2}^{+2}, He_2\)
- D \(H_{2}^-, He_2^{2+}\)
Answer & Solution
Correct Answer
(C) \(H_{2}^{+2}, He_2\)
Step-by-step Solution
Detailed explanation
Species having zero or negative bond order do not exist. \(\mathrm{H}_{2}^{2+}(1+1-2=0)=\sigma 1 \mathrm{s}^{0}\) Bond order \(=0\) \(\mathrm{He}_{2}(2+2=4)=\sigma 1 \mathrm{s}^{2},{ }^{\star} \mathrm{fs}^{2}\) Bond order \(=\frac{N_{0}-N_{a}}{2}=\frac{2-2}{2}=0\)…
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