WBJEE · Chemistry · General Organic Chemistry
Correct pair of compounds which gives blue colouration/precipitate and white precipitate, respectively, when their Lassaigne's test is separately done is
- A NH- \(\mathrm{NH}_{2}\), HCl and CICH, COOH
- B \(\mathrm{NH}_{2} \mathrm{CSNH}_{2}\) and \(\mathrm{PhCH}_{2} \mathrm{Cl}\)
- C \(\mathrm{NH}_{2} \mathrm{NH}_{2}, \mathrm{COOH}\) and \(\mathrm{NH}_{2} \mathrm{CONH}_{2}\)
Answer & Solution
Correct Answer
(D)
Step-by-step Solution
Detailed explanation
\(\begin{array}{ll}\text {Hydrozine, } & \mathrm{NH}_{2} \cdot \mathrm{NH}_{2} \text { does not respond }\end{array}\) Lassaigne's test because it does not contain any carbon and hence, NaCN is not formed. Compound, \(\mathrm{NH}_{2}-\mathrm{CS}-\mathrm{NH}_{2}\) contains both…
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