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In Lassaigne's test for nitrogen,the blu...

In Lassaigne's test for nitrogen,the blue colour is due to the formation of

A

Potassium ferrocyanide

B

Sodium cyanide

C

Sodium ferrocyanide

D

Ferri-ferrocyanide

Text Solution

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The correct Answer is:
D
`Fe_(4)[Fe(CN)_(6)]_(3)`
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DINESH PUBLICATION-PURIFICATION & CHARACTERISATION OF ORGANIC COMPOUND -Revision Q.F.Competitive exams
  1. A dibasic acid containing C,H and O was found to contain C=26.7% and H...

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  2. Leibing method is used for the estimation of

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  3. In Lassaigne's test for nitrogen,the blue colour is due to the formati...

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  4. Nitrogen in an organic compound can be estimated by

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  5. Distillation is used to separate liquids which differ in their boiling...

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  6. Which of the following organic compounds contains about 52 % carbon ?

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  7. The purity of an organic compound is determined by

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  8. During Lassaigne's test N and S present in an organic compound changes...

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  9. Which of the follom'ng technique is most suitable for purification of ...

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  10. The best method to separate the mixture of ortho and para nitrophenol ...

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  11. Chloroform and benzene form a pair of miscible liquids. These can be s...

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  12. Which one of the following is not used for the purification of solid i...

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  13. The compound that does not give a blue colour is Lassaigne's test is

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  14. Absolute alcohol is prepared by

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  15. If 0.24 g of a volatile liquid upon vaporization gives 45 ml of vapour...

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  16. An organic compound containing C,H and N gave the following analysis ...

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  17. Emprical formula of a hydrocarbon containing 80 % corbon and 20 % hydr...

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  18. If 0.2 g of an organic compound containing carbon,hydrogen and oxygen ...

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  19. A mixture contains four solid organic compounds containing A, B, C an...

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  20. In Kjedhal's method,, the nitrogen presence is estimed as

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