SAMPLE QUESTIONS
1. The angular momentum of an electron in 4s orbital, 3p orbital, and 4th orbit are
a) $0,\frac{1}{\sqrt{2}} \frac{h}{\pi}, \frac{2h}{\pi}$
b) $\frac{1}{\sqrt{2}} \frac{h}{\pi}, \frac{2h}{\pi},0$
c) $0,\frac{\sqrt{2}h}{\pi}, \frac{4h}{\pi}$
d) $\frac{\sqrt{2}h}{\pi}, \frac{4h}{\pi},0$
2. The de Broglie wavelength of a ball of mass 10 g moving with a velocity of 10 m s
^{-1} is ( h = 6.626 x 10
^{-34} Js)
a) 6.626 x 10
^{-33} m
b) 6.626 x 10
^{-29} m
c) 6.626 x 10
^{-31} m
d) 6.626 x 10
^{-36} m