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The best method for the separation of na...

The best method for the separation of naphthalene and benzoic acid from their mixture is

A

sublimation

B

Chromatography

C

Crystallisation

D

distillation

Text Solution

Verified by Experts

The correct Answer is:
C
Out of the given compounds only urea has N =46.67 % .Urea on heating gives a solid residue called which gives violet colour with alkaline `CuSO_(4)`
`H_(2)NCONH+H-NHCONH_(2) overset(Delta)rarr H_(2)NCONH_(2)+NH_(3)`
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DINESH PUBLICATION-PURIFICATION & CHARACTERISATION OF ORGANIC COMPOUND -Revision Q.F.Competitive exams
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  2. How much of sulphur is present in an organic compound ,if 0.53 g of th...

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  3. The best method for the separation of naphthalene and benzoic acid fro...

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  4. An organic compound having molecular mass 60 is found to contain C = 2...

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  5. An organic compound weighing 0.31 g gave 0.444 g of magnesium pyrophos...

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  6. Fractional distillation is a process by which the separation of differ...

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  7. 0.1 mol of a carbonhydrate with empirical formula CH(2)O contains 1 g ...

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  8. An organic compound contains carbon, hydrogen and oxygen. Its chemical...

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  9. In Lassaigne's test, a blood red colouration with Fe^(3+) ions indicat...

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  10. The compound formed in the positive test for nitrogen with Lassaigne's...

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  11. In sodium fusion test of organic compounds, the nitrogen of an organic...

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  12. An organic compound which produces a bluish green colored flame on hea...

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  13. Which of the following complex formation indicates presence of sulphur...

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

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  15. In the Duma's method of estimation of the organic compound is finaly c...

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  16. Which of the following compounds will not give Lassaigne's test for ni...

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  17. An organic compound on analysis was found to contain 10.06 % Carbon,0....

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  18. In Kjeldahl's method , ammonia from 5 g of food neutralizes 30 cm ^(3)...

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  19. In Lassaigne's test for the detection of halogen , the sodium fusion e...

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  20. In Duma's method,the gas which is collected in Nitromer is 0.35 g of ...

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