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In the Lassaigne’s test, the blood red c...

In the Lassaigne’s test, the blood red colouration is due to the formation of 

A

`Fe(CNS)`

B

`NaCNS`

C

`NH_(4)CNS`

D

`Fe(CNS)_(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
Ferric thiocynanate or sulphocyanide, `Fe(CNS)_(3^(+))`
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NARAYNA-PRACTICAL ORGANIC CHEMISTRY-SCQ_TYPE
  1. In Lassaigne’s test, the organic compound is fused with a piece of sod...

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  2. In the Lassaigne's test for the detection of nitrogen in an organic co...

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  3. In the Lassaigne’s test, the blood red colouration is due to the forma...

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

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

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  6. The percentate of sulphur in the organic, when 0.2595g of a sulphur co...

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  7. If 0.228 g of silver salt of dibasic acid gabe a residue of 0.162 g of...

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  8. In Carius tube the compound ClCH(2)-COOH was heated with fuming HNO...

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  9. Lassaigne's test for the detection of nitrogen fails in

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

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  11. The Lassaigne's extract is boiled with dil. HNO(3) before testing for ...

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  12. In Carius tube the compound ClCH(2)-COOH was heated with fuming HNO...

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

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  14. In sodium fusion test of roganilc compound, the nitrogen of a organic ...

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  15. Which of the following will give blood red colour with FeCl(5) in sodi...

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  16. Sulphide ions react with Na(2) [Fe(NO)(CN)(5)] to form a purple colour...

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  17. Which of the following will not give test for N in sodium extract?

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  18. Which of the following compounds, when heated with HNO(3) (conc), cool...

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  19. A substance was known by its mode of synthesis to contain 10 atoms of ...

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  20. Compound A,C(7)H(8)O, is insoluble in water, dilute HCl, and aquenous ...

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