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For detection of sulphur in an organic c...

For detection of sulphur in an organic compound, sodium nitroprusside is added to the sodium extract. A violet colour is obtained which is due to the formation of

A

`Na_4 [Fe(CN)_5 NOS]`

B

`Na_3 Fe (CN)_6`

C

`Fe(CNS)_3`

D

`Na[Fe(CN)_5 NS]`

Text Solution

Verified by Experts

The correct Answer is:
A
`Na_4 [Fe(CN)_5 NOS]`
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ICSE-ORGANIC CHEMISTRY : SOME BASIC PRINCIPLES AND TECHNIQUES -OBJECTIVE ( MULTIPLE CHOICE ) TYPE QUESTIONS
  1. Lassaigne's test is used in the qualitative analysis to detect

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  2. A compound which does not give positive test for nitrogen is: urea ...

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  3. For detection of sulphur in an organic compound, sodium nitroprusside ...

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

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  5. The Beilstein test for organic compounds is used to detect

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  6. In the Duma's method for estimating nitrogen in an organic compound, t...

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  7. In Kjeldahl's method, nitrogen present is estimated as

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  8. Carbon and hydrogen are estimated by

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  9. A compound containing 80% C and 20% H is likely to be: C6 H6 C2 H6...

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  10. An organic compound is found to contain C - 40%. 0 = 53.34% and H = 6....

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  11. An organic compound has an empirical formula CH2 O. Its vapour density...

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  12. The empirical formula of a compound is CH2. One mole of this compound ...

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  13. The concentration of C = 85.45%, and H = 14.44% is not obeyed by the f...

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  14. If two compounds have the same empirical formula but different molecul...

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  15. 0.759 g of a silver salt of a dibasic organic acid on ignition gave 0....

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  16. 0.400 g of chloroplatinate salt of a monoacid base on ignition gave 0....

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  17. 0.500 g of the silver salt of an organic dibasic acid on ignition give...

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  18. In a Victor Meyer's determination of molecular mass, 0.1015 g of an or...

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  19. 0.29 g of an organic compound on combustion gave 0.66 g of CO2 and 0.2...

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  20. The blue compound formed in the positive test for nitrogen with Lassai...

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