question_answer

The correct order in which the O ? O bond length increases in the following is     [BHU 2000; CBSE PMT 2005]

A)                 \[{{H}_{2}}{{O}_{2}}<{{O}_{2}}<{{O}_{3}}\]         

B)                 \[{{O}_{2}}<{{H}_{2}}{{O}_{2}}<{{O}_{3}}\]

C)                 \[{{O}_{2}}<{{O}_{3}}<{{H}_{2}}{{O}_{2}}\]         

D)                 \[{{O}_{3}}<{{H}_{2}}{{O}_{2}}<{{O}_{2}}\]

Correct Answer: C

Solution :

          \[H-O-O-H\],\[O\leftarrow O=O\],\[O=O\]           Due to resonance in \[{{O}_{3}}\]\[O-O\]bond length will be in b/w \[O=O\]and \[O-O\].