Question

Which among the following functional groups has been given the highest priority while assigning R-S configuration
A. `-C_(6)H_(5)`
B. `-CN`
C. `C_(2)H_(5)`
D. `-CH_(3)`

Answer 1

Correct Answer - B
In R-S configuration priority order depends upon atomic number of first atom attached to asymmetric carbon atom.
If priority order can not be settled on, first atom as it same in all groups, the atomic number of second and third atom in group is considered for priority order.