Classification of Elements and Periodicity in Properties - Result Question 29
####29. Which of the following statements is true? [2002]
(a) Silicon exhibits 4 coordination number in its compound
(b) Bond energy of $F_2$ is less than $Cl_2$
(c) $Mn$ (III) oxidation state is more stable than $Mn$ (II) in aqueous state
(d) Elements of 15 th group shows only +3 and +5 oxidation states
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Solution:
- (b) This is because of inter-electronic replusions between lone pairs.
\begin{tabular}{llll} B.E.: & $F-F$ & $Cl-Cl$ \\ $(kJ mol^{-1}):$ & 158.8 & 242.6 \\ & $: \ddot{F}$ & $\ldots$ \\ & $F:$ & \end{tabular}
