1
Match List I with List II: Choose the correct answer from the options given below:
- A-II, B-III, C-IV, D-I
- A-IV, B-III, C-II, D-I
- A-I, B-II, C-III, D-IV
- A-II, B-III, C-I, D-IV
Answer
(1) A-II, B-III, C-IV, D-I
Solution
A. Carbonate gives brisk effervescence of colourless, odourless CO2: CO32- + 2H+ CO2 + H2O (II).
B. Sulphide gives H2S, which smells of rotten eggs: S2- + 2H+ H2S (III).
C. Sulphite gives SO2 with a pungent (burning sulphur) smell: SO32- + 2H+ SO2 + H2O (IV).
D. Nitrite gives brown fumes of NO2: 3NO2- + 2H+ NO3- + 2NO + H2O, 2NO + O2 2NO2 (I).
Thus A-II, B-III, C-IV, D-I.
Answer: (1)
RE-NEET (UG) 2024