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In Lassaigne’s test, the organic compoun...

In Lassaigne’s test, the organic compound is fused with a piece of sodium metal in order to

A

increase the ionization of the compound

B

decrease the melting of the compund

C

increase the melting point of the compound

D

convert the covalent compund into a mixture of ionic compounds.

Text Solution

Verified by Experts

The correct Answer is:
D
To convert convalent compounds into ionic compounds `(NaCN,Na_(2)S,NaX)`
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I. Read the following passage and answer questions 1 - 5 that follow: Nitrogen, sulphur and halogens in an organic compound are detected by Lassaigne's test in which the organic compound is fused with sodium metal. During fusion N is converted to NaCN, S to Na_2 S and halogens to sodium halides. ln the Lassaigne's test for nitrogen in an organic compound, the prussian blue colour is due to ......

I. Read the following passage and answer questions 1 - 5 that follow: Nitrogen, sulphur and halogens in an organic compound are detected by Lassaigne's test in which the organic compound is fused with sodium metal. During fusion N is converted to NaCN, S to Na_2 S and halogens to sodium halides. What colour will you get in Lassaigne's test if the compound contains both N and S?

NARAYNA-PRACTICAL ORGANIC CHEMISTRY-SCQ_TYPE
  1. Detection of the chlorine is possible without preparing sodium extract...

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  2. During the testing for phosphorus in organic compounds, a yellow solut...

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  3. In Lassaigne’s test, the organic compound is fused with a piece of sod...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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