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Maxwell's Distribution of Speeds

The species t...

Question

The species that exhibits the highest R $_{f}$ value in a thin layer chromatogram using a non polar solvent on a silica gel is

A

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B

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C

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D

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Solution

The correct option is A

Nonpolar substance will have high R $_{f}$ value as solvent is nonpolar therefore option (A) will have high R $_{f}$ value as it has low dipole moment.

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The species that exhibits the highest R $_{f}$ value in a thin layer chromatogram using a non polar solvent on a silica gel is

Q. Silica gel is a very useful:

Q. chromatography in which a liquid sample migrates by capillarity through a solid adsorbent medium (as alumina or silica gel) which is arranged as a thin layer on a rigid support (as a glass plate) is called _______.

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Q. The layer paper chromatograpy is performed on an unknown substance. Three solvents were tested, and the corresponding

R_{f}

factors were measured:

1 - p r o p a n o l, R_{f} = 1.15; h e x a n e, R f = 0.32

; acetonitrile,

R_{f} = 1.74

.
Which of the solvents would best separate the unknown substance with an

R_{f} = 1.69

from a known substance with an

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?

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