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JEE Main & Advanced Chemistry The Solid State / ठोस प्रावस्था Question Bank Critical Thinking The Solid State

  • question_answer
    Which of the following molecules has three-fold axis of symmetry [UPSEAT 2004]

    A) \[N{{H}_{3}}\]  

    B) \[{{C}_{2}}{{H}_{4}}\]

    C) \[C{{O}_{2}}\]   

    D) \[S{{O}_{2}}\]

    Correct Answer: A

    Solution :

    In \[N{{H}_{3}}\] molecule, the original appearance is repeated as a result of rotation through \[{{120}^{o}}\]. Such as axis is said to be an axis of three-fold symmetry or a triad axis.


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