Chemistry Exam > Chemistry Videos > Crash Course for IIT JAM Chemistry > Optical activity|Dextrorotatory- laevorotatory|Angle of rotation & specific rotation
Optical activity|Dextrorotatory- laevorotatory|Angle of rotation & specific rotation Video Lecture | Crash Course for IIT JAM Chemistry
FAQs on Optical activity-Dextrorotatory- laevorotatory-Angle of rotation & specific rotation Video Lecture - Crash Course for IIT JAM Chemistry
| 1. What is optical activity? |  |
Ans. Optical activity refers to the ability of certain substances to rotate the plane of polarized light. This rotation occurs due to the asymmetry in the molecular structure of the substance.
| 2. What is the difference between dextrorotatory and laevorotatory? | |
Ans. Dextrorotatory and laevorotatory are terms used to describe the direction in which a substance rotates the plane of polarized light. Dextrorotatory substances rotate the light in a clockwise direction, while laevorotatory substances rotate it in a counterclockwise direction.
| 3. What is the angle of rotation? | |
Ans. The angle of rotation is the measure of the amount by which a substance rotates the plane of polarized light. It is usually expressed in degrees and can be either positive or negative, depending on the direction of rotation.
| 4. What is specific rotation? | |
Ans. Specific rotation is a characteristic property of a substance, which is a measure of its ability to rotate the plane of polarized light. It is defined as the angle of rotation produced by a pure substance at a specific concentration, temperature, and wavelength of light.
| 5. How is optical activity determined experimentally? | |
Ans. Optical activity can be determined experimentally by using a polarimeter. A polarimeter measures the angle of rotation produced by a substance when polarized light passes through it. The specific rotation of the substance can then be calculated using the formula specific rotation = observed rotation / (concentration x path length).
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