Complete the reactions by matching List-I with List-II.
List-I
List-ll
A) 2Na2S2O3+I2Δ−→
1) Photographic complex Ag2S2O3
B) Na2S2O3+dil.HCl→
2) Ag2S+NaBr
C) Na2S2O3+AgNO3→
3) NaCl+SO2+S+H2O
D) Na2S2O3+AgBr→
4) Na2S4O6+2NaI
The correct match is:
A
(A)-2, (B)-1, (C)- 4, (D)-3
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B
(A)-1, (B)-2, (C)- 3, (D)-4
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C
(A)-3, (B)-4, (C)- 2, (D)-1
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D
(A)-4, (B)-3, (C)- 1, (D)-2
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Solution
The correct option is D (A)-4, (B)-3, (C)- 1, (D)-2 A) 2Na2S2O3+I2→Na2S4O6+2NaI In this reaction, sodium thiosulphate acts as a reducing agent and reduces Iodine. (B)Na2S2O3+dil.Ha→NaCl+SO2+S+H2O (C)Na2S2O3+AgNO3→Ag2S2O3 complex compound used in photographic films. (D)Na2S2O3+AgBr→Ag2S+NaBr