Paragraph for Question Nos. 41 to 43 In a mixture of H – He+ gas (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 collisions). Assume that the Bohr model of atom is exactly valid. Figure : 1. 41. The quantum number n of the state finally populated in He+ ions is   2   3   4   5   Hint Half-n-half Clue   2. 42. 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   Half-n-half Clue   3. 43. The ratio of the kinetic energy of the n = 2 electron for the H atom to that of He+ ion is   1 4   2   1 2   1   Half-n-half Clue