Match List I with List II and select the answer using the code given below the Lists: List I (Reaction) List II (Type) A. CaO(s) + H_2O(l) Ca(OH)_2(aq) 1. Single displacement B. CaCO_3(s) CaO(s) + CO_2(g) 2. Double displacement C. Pb(s) + CuCl_2(aq) PbCl_2(aq) + Cu(s) 3. Combination D. Na_2SO_4(aq) + BaCl_2(aq) BaSO_4(s) + 2NaCl(aq) 4. Decomposition
C. A-3, B-4, C-1, D-2
Reaction A: CaO(s) + H_2O(l) Ca(OH)_2(aq) is a combination reaction because two substances combine to form a single product. (A 3) Reaction B: CaCO_3(s) CaO(s) + CO_2(g) is a decomposition reaction because a single compound breaks down into two simpler substances upon heating. (B 4) Reaction C: Pb(s) + CuCl_2(aq) PbCl_2(aq) + Cu(s) is a single displacement reaction because lead displaces copper from the copper chloride solution. (C 1) Reaction D: Na_2SO_4(aq) + BaCl_2(aq) BaSO_4(s) + 2NaCl(aq) is a double displacement reaction because there is a mutual exchange of ions between the two reactants to form a precipitate. (D 2) The correct matching is A-3, B-4, C-1, D-2. Answer: A-3, B-4, C-1, D-2
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