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Match List I with List II. List I (Anion) List II (Gas evolved on reaction with dil H 2 SO 4 ) A. − 2 3 CO I. Colourless gas which turns lead acetate paper black. B. S 2– II. Colourless gas which turns acidified potassium dichromate solution green C. − 2 3 SO III. Brown fumes which turns acidified KI solution containing starch blue. D. − 2 NO IV. Colourless gas evolved with brisk effervescence, which turns lime water milky. Choose the correct answer from the options given below:

1. A-III, B-I, C-II, D-IV
2. A-II, B-I, C-IV, D-III
3. A-IV, B-I, C-III, D-II
4. A-IV, B-I, C-II, D-III

Correct answer: A-IV, B-I, C-II, D-III

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