JEE Main levelSingle correct optionDifficulty 2 of 3qc017
Match the group in Column I with its reagent in Column II.
Column I: (P) Group I, (Q) Group III, (R) Group IV, (S) Group V.
Column II: (1) NHX4Cl + NHX4OH, (2) (NHX4)X2COX3 with NHX4Cl and NHX4OH, (3) dilute HCl, (4) HX2S in ammoniacal medium.
AP-3, Q-1, R-4, S-2
BP-3, Q-4, R-1, S-2
CP-1, Q-3, R-4, S-2
DP-3, Q-1, R-2, S-4
Answer: A
Group I is precipitated as chlorides by dilute HCl (3). Group III uses NHX4Cl + NHX4OH (1). Group IV uses HX2S with ammonia (4). Group V uses ammonium carbonate (2). So P-3, Q-1, R-4, S-2.