Match the compounds in Column I with their characteristics/tests/reactions given in Column II.
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Solution
Note: It does not give test for N, i.e., sodium fusion extract of the compound (Lassaigne's test). Only the compounds containing C and N give Lassaigne's test. It does not contain C, so its Lassaigne extract with FeSO4 and FeCl3 does not give prussian colour.
(b→p,q) i. Since (b) contains both C and N, it gives test for N. C+N+Na→NaCN 6⊝CN+Fe2+→[Fe(CN)6]4−4Fe3+⟶Fe4[Fe(CN)6]3Ferriferrocyanide ii. Phenolic compound gives violet or red colouration with FeCl3. ii. (b) contains ⊝I ion, so it gives yellow-white precipitate (AgI) with AgNO3. (c→p,q,r) i. (c) also contains C and N and gives test for N as shown above in (b). ii. (c) is phenolic compound; it also gives colour with FeCl3. iii. (c) contains ⊝Cl ion, so it gives white ppt. (AgCl) with AgNO3.
(d→p,s) i. (d) also contains C and N and gives test for N as shown above in (b). ii.It is hydrobromide salt of 2,4-DNP, so it reacts with aldehyde to form 2,4-DNP derivative. iii. (d) contains Br⊝ ion, so it gives pale yellow precipitate (AgBr) with AgNO3.