Match the compounds in Column I with their characteristic test(s)/reaction(s) given in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 × 4 matrix given in the ORS.
← IIT-JEE 2008 · Paper 2
ChemistryMatrix match+6Question 64 of 66
IIT-JEE 2008 · Paper 2, Chemistry question 64
Column I
- A
- B(4-hydroxyphenylglycine hydroiodide)
- C(4-hydroxyanilinium chloride)
- D(2,4-dinitrophenylhydrazinium bromide)
Column II
- Psodium fusion extract of the compound gives Prussian blue colour with
- Qgives positive test
- Rgives white precipitate with
- Sreacts with aldehydes to form the corresponding hydrazone derivative
| P | Q | R | S | |
|---|---|---|---|---|
| A | ||||
| B | ||||
| C | ||||
| D |
Answer and worked solution
Official answer: A → R; B → P, Q; C → P, Q, R; D → P
- A, hydrazine hydrochloride. No carbon, so the sodium-fusion extract has no cyanide (no Prussian blue). The chloride gives white AgCl. → R. (It also forms hydrazones with aldehydes, S, which the key accepts as an alternative.)
- B. Contains C and N (Prussian blue, P) and a phenolic OH (violet with , Q). The iodide gives a yellow AgI precipitate, not white. → P, Q.
- C, 4-hydroxyanilinium chloride. C and N (P), phenol (Q), chloride (white AgCl, R). → P, Q, R.
- D, 2,4-dinitrophenylhydrazinium bromide. C and N (P); AgBr is pale yellow, not white. → P. (As a hydrazine it also forms hydrazones, S, accepted as an alternative.)
Answer: A → R; B → P, Q; C → P, Q, R; D → P (the key also accepts A → R, S and D → P, S)