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Fractional crystallization is carried ou...

Fractional crystallization is carried out to separate

A

Organic solids mixed with inorganic solids

B

Organic solids highly soluble in water

C

Organic solids having small difference in their solubilities in a suitable solvent

D

Organic solids having great difference in their solubilities in a suitable solvent

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The correct Answer is:
C
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A mixture of carboxylic acids (X) and (Y) cannot be separated by normal methods however when this mixture is treated with optically active quinine give optically active salts (P) and (Q). These two salis can be separated by fractional crystallization, separated and acidified with HCl to form amines and carboxylic acids. (P) and (Q) are separated by fractional crystallization due to

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AAKASH SERIES-PURIFICATION OF ORGANIC COMPOUNDS AND IUPAC NOMENCLATURE-LECTURE SHEET (EXERCISE - I (STRAIGHT OBJECTIVE TYPE QUESTIONS))
  1. During the test for halogens, sodium extract is first boiled with nitr...

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  2. Copper wire test for halogens is known as

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  3. In which of the following compounds, nitrogen cannot be tested by Lass...

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  4. A compound which does not give a positive test in Lassaigne.s test for...

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  5. In the Duma's method for the estimation of nitrogen in an organic comp...

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  6. In the estimation of sulphur in an organic compound, fuming nitric aci...

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  7. In the estimation of nitrogen by Duma's method 1.18g of an organic com...

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  8. In organic compounds, phosphorus is estimated as:

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  9. Kjeldahl's method cannot be used for the estimation of nitrogen in

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  10. An organic compound contains C = 40%, H = 13.33% and N = 46.67%. Its e...

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  11. The blood red colour in the combination test of nitrogen and sulphur i...

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  12. The violet colour obtained during the test of sulphur Lassaigne's test...

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  13. Which of the following compounds gives blood red colouration when its ...

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  14. An organic compound which produces a bluish green coloured flame on he...

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  15. Fractional crystallization is carried out to separate

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  16. Mixture of nitrobenzene and aniline can be separated by

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  17. Two substances when separated on the basis of partition coefficient be...

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  18. Absolute alcohol can be prepared from rectified spirit by

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  19. The ammonia evolved by the treatment of 0.30 g of an organic compound ...

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  20. 28 mg of an organic compound containing nitrogen was digested accordin...

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