Question

R7
If 9.9 eV energy is supplied to H atom, the no.
of spectral lines emitted is equal to :-
(1) 0 (2) 1 (3) 2
(4) 3​

Answer 1

Answer:

(1)0

Explanation:

If 9.9 eV energy is supplied to H atom the no. of spectral lines emitted is equal to 0.

The energy difference between ground state and first excited state of electron of H atom is 13.6−3.4=10.2eV.

When energy less than this is applied, no emission occurs.

Answer 2

Answer:

Ans : 1). 0 spectral lines