WBJEE Practice Quiz

Question 1

According to Bohr's model, the angular momentum of an electron revolving in the nth orbit of a hydrogen atom is:

Accepted Answer

n(h/2π)

Question 2

The radius of the first Bohr orbit of hydrogen atom is approximately:

Accepted Answer

0.529 Å

Question 3

The shortest wavelength in the Balmer series of hydrogen is produced when the electron falls from:

Accepted Answer

n = ∞ to n = 2

Question 4

A photon of energy 12.09 eV is absorbed by a hydrogen atom in the ground state. To which orbit is the electron excited?

Accepted Answer

n = 3

Question 5

For a hydrogen-like species, the radius of the nth orbit is proportional to:

Accepted Answer

n^2/Z

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