Chemical Bonding And Molecular Structure Question 72
Question: The correct order of increasing $ C-O $ bond length of $ CO,CO_3^{2-},CO_2 $ is
Options:
A) $ CO_3^{2-}<CO_2<CO $
B) $ CO_2<CO_3^{2-}<CO $
C) $ CO<CO_3^{2-}<CO_2 $
D) $ CO<CO_2<CO_3^{2-} $
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Answer:
Correct Answer: D
Solution:
B.O. in CO i.e., $ :\overset{-}{\mathop{C}},=\overset{+}{\mathop{O}},: $ is 3, that of $ O=C=O $ is 2 while that of $ CO_3^{2-} $ ion is 1.33. Since the bond length increases as the bond order decreases i.e. $ CO<CO_2<CO_3^{2-} $ . Thus option D is correct.
