Which of the following statements is(are) true?
i. An excited atom can return to its ground state by absorbing electromagnetic radiation.II. The energy of an atom is increased when electromagnetic radiation is emitted from it.III. The energy of electromagnetic radiation increases as its frequency increases.IV. An electron in the n = 4 state in the hydrogen atom can go to the n = 2 state by emitting electromagnetic radiation at the appropriate frequency.V. The frequency and wavelength of electromagnetic radiation are inversely proportional to each other.
A) III, V
B) II, III, IV
C) I, II, IV
D) I, II, III
E) III, IV, V

Question

Quizplus · Accepted Answer

i. An excited atom can return to its ground state by emitting electromagnetic radiation, not by absorbing it. So, statement i is false.
ii. When electromagnetic radiation is emitted by an atom, its energy decreases, not increases. So, statement ii is false.
iii. This statement is true according to the equation E = hf, where E is the energy of the electromagnetic radiation, h is Planck's constant and f is its frequency. So, statement iii is true.
iv. This statement is also true as it follows the principle of the emission spectrum of hydrogen, where an electron in a higher energy level can emit electromagnetic radiation and go to a lower energy level. So, statement iv is true.
v. This statement is true as the equation c = fλ, where c is the speed of light, f is the frequency, and λ is the wavelength, shows that wavelength and frequency are inversely proportional to each other. So, statement v is true.

Which of the Following Statements Is(are) True