Virtual Labs

Laurent's half shade polarimeter: To determine the specific rotation of optically active substance

The quantity that is measured by a polarimeter is,

a: Polarity of the substance Explanation

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b: Electrical conductivity of solution Explanation

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c: Wavelength of source light Explanation

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d: pH of the substance Explanation

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Specific rotation of an optically active compound is

a: The optical rotation at specific chiral centre Explanation

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b: Optical rotation of one molecule Explanation

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c: Optical rotation at unit length and unit concentration Explanation

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d: Optical illusion of pure chiral solution Explanation

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Which of the following is a true statement?

a: Chiral molecules will rotate polarized light in a clockwise direction, termed dextrorotatory, and its mirror-image partner in a counter-clockwise termed levorotatory Explanation

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b: Chiral molecules will rotate polarized light in a clockwise direction, termed levorotatory, and its mirror-image partner in a counter-clockwise termed dextrorotatory Explanation

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c: Chiral molecules will rotate polarized light in a counter-clockwise direction, termed dextrorotatory, and its mirror-image partner in a clockwise termed levorotatory Explanation

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d: None of the options is true Explanation

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Polarimeter works on the principle of which of the following?

a: Change in the flow of liquids Explanation

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b: Change in the electrical conductivity of solution with concentration Explanation

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c: Interference of light Explanation

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d: Polarisation of light Explanation

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Which of the following most accurate about a plane polarised light?

a: As it propagate, both magnitude of electric vector and direction of polarisation varies Explanation

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b: As it propagate, neither magnitude nor direction of electric vector varies Explanation

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c: As it propagate, magnitude of electric vector varies periodically but direction of polarisation remains unchanged Explanation

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d: Change in orientation of Nicol prism has no effect on direction of polarisation Explanation

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