Which of the following statements are true regarding Bohr’s model of hydrogen atom? I. Orbiting speed of electron decreases as it shifts to discrete orbits away from the nucleus II. Radii of allowed orbits of electron are proportional to the principal quantum number III. Frequency with which electrons orbit around the nucleus in discrete orbits is inversely proportional to the cube of principal quantum number IV. Binding force with which the electron is bound to the nucleus increases as it shifts to outer orbits

 

 Question:  100% NCERT covered from Particular Keyword.Explanations are 100% from NCERT | [Difficult level: Easy] From NCERT NEET Derived Question.

Which of the following statements are true regarding Bohr’s

model of hydrogen atom?

I. Orbiting speed of electron decreases as it shifts to

discrete orbits away from the nucleus

II. Radii of allowed orbits of electron are proportional to

the principal quantum number

III. Frequency with which electrons orbit around the

nucleus in discrete orbits is inversely proportional to

the cube of principal quantum number

IV. Binding force with which the electron is bound to the

nucleus increases as it shifts to outer orbits

(a) I and II (b) II and IV

(c) I, II and III (d) II, III and IV

Answer: 

(a) Orbital speed varies inversely as the radius of the orbit.