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Blazing goIITian

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2 Apr 2009 14:35:59 IST

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Wat is the AgNO3 test and the sodium nitroprusside test??

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Wat is the AgNO3 test and the sodium nitroprusside test??

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Abhishek S

Blazing goIITian

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2 Apr 2009 14:43:21 IST

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Concerning practical chem,nitroprusside test is used for detection of nitrogen..postive test gives deep violet colouration...and agno3 test is for organic compounds containing an acidic hydrogen..for egCh(reple bond)Ch2-Ch3that is prop-1-yne answers agno3 test cos it has an acidic hydrogen that is eliminated...rate if helpful..

Madhusudan Chavan

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2 Apr 2009 21:08:24 IST

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Sodium nitroprusside test is for detection of sulphur from soda extract, it produces violet colour when sulphur is present.

Na2S + Na2[Fe(CN)5NO] ........>Na4[Fe(CN)5NOS]

Sodium nitroprusside Sodium sulpho nitroprusside ( violet colour)

Silver nitrate test is for detection of halogen

NaX + AgNO3 ........>AgX + NaNO3

White ppt soluble in NH4OH is AgCl; Pale yellow ppt sparingly soluble in NH4OH is AgBr; Bright yeoolow ppt insoluble in NH4OH is AgI; thus the halogen present in the compound can be confirmed accordingly.

#$nishi$#

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3 Apr 2009 07:51:22 IST

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with sodium nitroprusside and few drops of alkali

Aldehydes give a deep red colour (execpt formaldehyde)

whereas in Ketones red colour changes to orange.

Siddhartha Gupta

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7 Apr 2009 10:43:42 IST

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Thanks a lot all three of you...But Madhu and Abhishek have given contradicting answers....does Nitrogen give violet with Sodium Nitroprusside or Sulphur ?? ...... Also, Benzophenone does not give the sodium nitroprusside test .... Found a good link for the AgNO3 test : Check it out: http://www.chemguide.co.uk/organicprops/haloalkanes/agno3.html . . . . . . . Though it does not mention terminal alkynes giving the test ...?? Can any1 please confirm the effect of acidic terminal alkynes on AgNO3 ??

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