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IIT JEE Advanced 2008 Paper 1

Paragraph for Questions 21–23:
In a mixture of H and He+ gases (He+ is singly ionized He atom), H atoms and He+ ions are excited to their respective first excited states. Subsequently, H atoms transfer their total excitation energy to He+ ions (by collision). Assume that the Bohr model of atom is exactly valid.

Question : 22

Total: 69

The wavelength of light emitted in the visible region by He+ ions after collisions with H atoms is

6.5 × 10−7 m
5.6 × 10−7 m
4.8 × 10−7 m
4.0 × 10−7 m

Validate

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