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Stereoisomerism

Which of the ...

Question

Which of the following molecules has three-fold axis of symmetry?

A

N H_{3}

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B

C_{2} H_{4}

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C

C O_{2}

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D

S O_{2}

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Solution

The correct option is C $N H_{3}$
In $N H_{3}$ molecule, the original appearance is repeated as a result of rotation through $120^{\circ}$ . Such as axis is said to be an axis of three-fold symmetry or a triad axis.

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Which of the following molecules has three-fold axis of symmetry

[UPSEAT 2004]

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