The incorrect statement is

Options

A. circumference of electron orbit `(2pi r) = n lambda` (n = an integer)
B. de-Broglie equation : `lambda = (h)/(mv)`
C. angular momentum of an electron `((h)/(mv) = (2pi r)/(n) or mvr = n(h)/(2pi))` is an integral multiple of `(h)/(2pi)`.
D. angular momentum of the electron in not quantized.

Answer

D

Explanation

Angular momentum of an electron orbiting around the nucleus is, `mvr =n(h)/(2pi)`
`:.` Angular momentu7m is said to be quantized.