a compound which does not give a positive result in the lassaigne's test for nitrogen is
a) urea
b) hydroxyl amine
c) glycine
d) phenylhydrazine
Answers
Answered by
11
I think it's fourth one...
sj2001:
why?
lassaignes test is used for detection of halogens, nitrogen and sulphur
some compounds like hydrazine (NH2.NH2)although contain nitrogen but they do not respond lassaignes test because they donot have carbon and hence, NacN Is not formed
sorry to say that I'm not sure..
ok thanks
:)
are u a student ?
or teacher ?
yes
student..
Answered by
2
Hydroxyl Amine is the compound which doesn’t give a positive result in the Lassaigne’s test.
Option (b).
Explanation:
- The hydroxylamine doesn’t give a positive result as it lacks a carbon atom. Hence it won’t be capable of forming the cyano group.
- Hydroxylamine is an inorganic compound with the formula
.
- It is a pure material with white colour and unstable crystalline,
- Therefore the Prussian blue is not formed which results in the compound hydroxyl amine not giving a positive test for nitrogen in the Lassaigne’s test.
Learn more about Hydroxyl Amine
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