General Organic Chemistry Question 8
Question 8 - 29 January - Shift 1
Compound that will give positive Lassaigne’s test for both nitrogen and halogen is
(1) $N_2 H_4 \cdot HCl$
(2) $CH_3 NH_2 . HCl$
(3) $NH_4 Cl$
(4) $NH_2 OH . HCl$
Show Answer
Answer: (2)
Solution:
Formula: Lassaigne’s Test
$CH_3 NH_2 . HCl \xrightarrow[\text{ fusion }]{Na} NaCN$ and $NaCl$
$NaCN$ gives $+ve$ test for nitrogen and
$NaCl$ gives + ve test for halogen
