SAMPLE QUESTIONS
1. Of the following sets, which one does not contain isoelectronic species?
a) $BO_{3}^{3-}, CO_{3}^{2-}, NO_{3}^{-}$
b) $SO_{3}^{3-}, CO_{3}^{2-}, NO_{3}^{-}$
c) $CN^{-},N_{2},C_{2}^{2-}$
d) $CN^{-},N_{2},C_{2}^{2-}$
2. The orbit angular momentum for an electron revolving in an orbit is given by $\sqrt{l\left (l + 1 \right )}\frac{h}{2\pi}$ . This momentum for s-electrons will be given by
a) $+\frac{1}{2} . \frac{h}{2\pi}$
b) zero
c) $\frac{h}{2\pi}$
d) $+\frac{1}{2} . \frac{h}{2\pi}$