AP EAMCET · Chemistry · General Organic Chemistry
The concentration of an organic compound in chloroform is \(6.15 \mathrm{~g}\) per \(100 \mathrm{~mL}\) of solution. A portion of this solution in a \(5 \mathrm{~cm}\) polarimeter tube causes an observed rotation of \(-1.2^{\circ}\). What is the specific rotation of the compound?
- A \(+12^{\circ}\)
- B \(-3.9^{\circ}\)
- C \(-39^{\circ}\)
- D \(+61.5^{\circ}\)
Answer & Solution
Correct Answer
(C) \(-39^{\circ}\)
Step-by-step Solution
Detailed explanation
\(\begin{aligned} {[\alpha] } & =\frac{[\alpha]_{\text {observed }}}{l \times C} \\ & =\frac{-1.2}{5 \times \frac{6.15}{1000}}=-39^{\circ}\end{aligned}\)
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