Chemistry - PRACTICAL ORGANIC CHEMISTRY Question with Solution | TestHub
Consider the following Venn diagrams related to compounds containing various elements,
(C, H, N are elements and P, Q, R, S are regions)
Choose the correct statements.
(I) Region - P compounds do not require Lassaigne's extract for detection of elements
(II) Region - R compounds give positive Lassaigne's test for nitrogen
(III) All Region - S compounds give positive Lassaigne's test for nitrogen
(IV) All Regions - S compounds nitrogen cannot be quantified using Kjehldahl's method
(V) Hydrazine and hydroxylamine are examples of region
Options:
Answer:
Solution:
Concepts: Lassaigne's test, Kjeldahl's method, nitrogen detection.
(I) P: C, H only. No N, S, halogens. Lassaigne's not needed.
(IV) S: N, C, H, but not all N compounds are Kjeldahl-quantifiable.
(V) Hydrazine (N₂H₄) and hydroxylamine (NH₂OH) contain N, H, but no C, thus in region R.
