The Bohr model of atoms

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assumes that the angular momentum of electrons is quantized

uses Einstein's photoelectric equation

predicts continuous emission spectra for atoms

predicts the same emission spectra for all types of atoms

answer is A.

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Detailed Solution

According to Bohr's hypothesis, electron can revolve only in those orbits in which its angular momentum is an integral multiple of h2π, where hbeing the Planck's constant. In these orbits, angular momentum of electron can have magnitude as h2π,2h2π,3h2π,…etc.. but never as 1.5 h2π,2.5 h2π,3.5 h2π, …etc. This is called the quantisation of angular momentum.

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