In a mixture of gas

CHEMISTRY · Single correct · CBSE · Chemistry · Structure of Atom · Structure of Atom

Problem

In a mixture of

\text{H--He}^+

gas,

\text{He}^+

is a singly ionized helium atom. H atoms and

\text{He}^+

ions are excited to their respective first excited states. Subsequently, H atoms transfer their total excitation energy to

\text{He}^+

ions by collisions. Assume that the Bohr model of the atom is exactly valid. The quantum number

n

of the state finally populated in

\text{He}^+

ions is (1) 2 (2) 3 (3) 4 (4) 5