1.

The molecule having three fold axis of symmetry is :A. `NH_(3)`B. `C_(2)H_(4)`C. `CO_(2)`D. `SO_(2)`

Answer» Correct Answer - a
In `NH_(3)` molecule the original appozance is optated as a result of rotation through `120^(@)` such an axis is steel in be an axis of three fold symmetry or a third axis


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