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Q.

The wave number of the first line is Balmer series of hydrogen in 15200 cm–1. The wave number of the first line in the Balmer series of Li2+ is

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a

15200 cm–1

b

60800 cm–1

c

76000 cm–1

d

136,800 cm–1

answer is D.

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Detailed Solution

v-=1λ=RZ21n12-1n22              =R×121212-1322              =9×15200=136800 cm-1

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