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JEE Main & Advanced JEE Main Paper (Held On 25 April 2013)

  • question_answer
                    The inter nuclear distances in O-O bonds for \[\operatorname{O}_{2}^{+},{{\operatorname{O}}_{2}},\operatorname{O}_{2}^{-}\] and \[\operatorname{O}_{2}^{2-}\] respectively are:

    A) \[1.30\,\overset{\text{o}}{\mathop{\text{A}}}\,,\,1.49\overset{\text{o}}{\mathop{\text{A}}}\,,\,1.12\,\overset{\text{o}}{\mathop{\text{A}}}\,,\,1.21\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    B)                        \[1.49\,\overset{\text{o}}{\mathop{\text{A}}}\,,\,1.21\,\overset{\text{o}}{\mathop{\text{A}}}\,,\,1.12\,\overset{\text{o}}{\mathop{\text{A}}}\,,\,1.30\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    C)                        \[1.21\,\overset{\text{o}}{\mathop{\text{A}}}\,,\,1.12\,\overset{\text{o}}{\mathop{\text{A}}}\,,\,1.49\,\overset{\text{o}}{\mathop{\text{A}}}\,,\,1.30\,\overset{\text{o}}{\mathop{\text{A}}}\,\,\]

    D)                        \[1.12\,\overset{\text{o}}{\mathop{\text{A}}}\,,\,1.21\,\overset{\text{o}}{\mathop{\text{A}}}\,,\,1.30\,\overset{\text{o}}{\mathop{\text{A}}}\,,\,1.49\,\overset{\text{o}}{\mathop{\text{A}}}\,\,\]

    Correct Answer: D

    Solution :

                    The bond length follows the order \[O_{2}^{+}<{{O}_{2}}<O_{2}^{-}<O_{2}^{2-}\] According to this the possible values are \[1.12{\AA},1.21{\AA},1.30{\AA},1.49{\AA}\]


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