In which of the following pairs of molecules/ions, both the species are not likely to exist?
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a
H22+, He2
b
H2–, He22+
c
H2+, He22–
d
H2–, He22–
answer is A.
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Detailed Solution
According to MOT,if B.O is zero (or) fractional, then the molecule can't exist in nature.Form the given speciesH2+2 & He2 can't exist in nature due to their zero bondorder [i.e., No bond exist]