Chemistry Fundamental Principles of Organic Chemistry ETEA 2022
PMDC Verified Question 44 of 83
Optical activity of a compound is measure by and instrument called:
A
Hydrometer
B
Barometer
C
Calorimeter
D
Polarimeter
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Polarimeter
Concept:

Optical activity is the ability of a chiral compound to rotate the plane of plane-polarized light.

Solution:

  • A polarimeter is the specific scientific instrument designed to measure the angle of rotation caused by passing polarized light through an optically active substance.


Why other options are incorrect:

A hydrometer measures specific gravity (density). A barometer measures atmospheric pressure. A calorimeter measures heat of reaction.

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