Teaching Haryana (HPSC) Assistant Professor Mock Test 2025 Chemical Sciences Principles of Stereochemistry
The specific rotation [α]D for S–(+)–2-butanol is 10° mL/g dm. The observed optical rotation (αobs) of a sample composed of a mixture of (R)- and (S)-2-butanol is –0.45°. If the cell path length is 0.6 dm and the concentration of 2-butanol in the sample is 0.15 g/mL, the percentages of (R) and (S) enantiomers in the sample are
1
(R) = 25%, (S) = 75%
2
(R) = 40%, (S) = 60%
3
(R) = 60%, (S) = 40%
4
(R) = 75%, (S) = 25%
5
Question Not Attempted