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Which of the following compounds gives b...

Which of the following compounds gives blood red colouration when its Lassaigne's extract is treated with alkali and ferric chloride .

A

Thiourea

B

Benzamide

C

Phenyl hydrazine

D

Diphenyl sulphide

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The correct Answer is:
A
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OP TANDON-CHARACTERISATION OF ORGANIC COMPOUNDS -OBJECTIVE QUESTIONS Level-A
  1. The sodium extract on acidification with acetric acid and then adding ...

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  2. The sodium extract on acidification with acetric acid and then adding ...

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

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  4. Copper wire test is called

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  5. Duma's method involves the determination of content of nitrogen in the...

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  6. In Lassaigne's solution, pink/violet colouration is produced when sodi...

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  7. An organic compound on heating with CuO produces CO(2) but no water. I...

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  8. Lassaigne's test (with silver nitrate) is commonly used to detect halo...

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

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  10. In Kjeldahl's method of estimation of N,CuSO(4) acts as

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  11. In dumas method for the estimation of nitrogen in an organic compound,...

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

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  13. The hottest region of Bunsen flame shown in the figure below is:

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  14. In the estimation of sulphur organic compound on treating with conc. H...

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  15. Schiff's and Piria method is used for the estimation of:

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  16. Prussian blue colour is obtained by mixing together aqueous solution o...

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

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  18. The violet colour in the Lassaigne’s test of sulphur is due to

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  19. At 300 K and 1 atm, 15 mL of a gaseous hydrocarbon requires 375 mL air...

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  20. Mark the incorrect statement in nitrogen Kjeldhal's method of estimati...

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