CET Karnataka Engineering
CET - Karnataka Engineering Solved Paper-2008
question_answer
How many optically active stereomers are possible for butan-2,3-diol?
A) 1
B) 2
C) 3
D) 4
Correct Answer:
B
Solution :
where \[{{C}^{*}}=\] asymmetric C atom It is a symmetrical molecule, so the number of optically active stereomers \[={{2}^{n-1}}\] (n = number of asymmetric C atom) \[={{2}^{2-1}}\] \[={{2}^{1}}=2\]