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Match List-I with List-II: List-I: (P) Carbonate, (Q) Sulfide, (R) Nitrate, (S) Sulfate List-II: (1) Releases gas with dilute HCl, (2) The released gas turns blue litmus red (acidic gas), (3) Gives alkaline gas with Zn + KOH, (4) Gives white precipitate with barium ions, (5) Has trigonal planar structure Which matching is correct?
- P -> 1,2; Q -> 2,4,5; R -> 3,5; S -> 4
- P -> 1,2,4,5; Q -> 1,2,4; R -> 3,5; S -> 4
- P -> 1,2; Q -> 1,2,4; R -> 3,5; S -> 1,2,4
- P -> 1,2,3; Q -> 1,2; R -> 1,2,3,4,5; S -> 4
Correct answer: P -> 1,2; Q -> 1,2,4; R -> 3,5; S -> 1,2,4
Solution
CO3²- reacts with dil. HCl -> CO2 (acidic, turns litmus red): properties 1,2. CO3²- is trigonal planar: property 5. S²- reacts with dil. HCl -> H2S (acidic gas): properties 1,2. BaS white ppt: property 4. NO3⁻ with Zn+KOH in alkaline medium -> NH3 (alkaline gas): property 3. NO3⁻ is trigonal planar: property 5. SO4²- with Ba²+ -> BaSO4 white ppt: property 4. SO4²- with dil. HCl doesn't readily react (BaSO4 insoluble in HCl). Looking at option C: P->1,2; Q->1,2,4; R->3,5; S->1,2,4. For S (sulfate): 1 and 2 would mean sulfate gives gas with HCl. Actually concentrated H2SO4 with certain metals gives SO2, but dilute sulfate with HCl doesn't give gas. Property 4 for sulfate (BaSO4 ppt) is correct. Option A: P->1,2; Q->2,4,5 (Q sulfide trigonal planar? No); R->3,5; S->4. Option C seems most consistent.
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