Question

can you please explain the answers

9. Based on the solubility rules, which one of the following compounds should be insoluble in water? A) Na2SO4 B) BaSO4 C) CuSO4 D) MgSO4 E) Rb2SO4 10. Identify the reducing agent in the following chemical reaction. Cd + NiO2 + 2H2O → Ca(OH)2 + Ni(OH)2 A) Cd B) Ni02 C) HO D) Ca(OH)2 E) Ni(OH)2 11. The oxidation number of Cl in CIO3 is A) -1 B) +7 D) +3 E) None of the above. 12. Which of the following represents an acid-base neutralization reaction? A) 2Al(s) + 3H2SO4(aq) → Al:(SO )3(aq) + 3H2(g) B) SO2(g) + H2O(l) → H2SO3(g) C) LiOH(aq) + HNO3(aq) → LINO3(aq) + H2O(1) D) 2K Br(aq) + Cl2(g) → 2Cl(aq) + Brz(1) E), CaBry(aq) + H2SO4(aq) → Caso (s) + 2HBr(g) 13. Which of the following elements is most likely to be a good conductor of electricity? Α) Ν B) S C) He D) CI E) Fe

Answer 1

Solution + 2 -241 lo +4 -2 Fon:- Qub.9B9504 is insoluble in water. According to Solubility Rule most Sulfate scelts are soluble, Exception to this Rule Bason is insoluble. Because it has high lattic enthalpy and it's hydration Enthalpy decreases more seepidly than lottic enthalpy on dissolving in water Qul:10 çd + Noz +24129 0 19327 oxidection No. Reducing Ragenti - A Reducing Agent is an ele- or compound that loses - an an ele- to another chemical species in Redox Reaction it is said to have been oxidizied I cd loses ele- to form o to +2 A cd (Reducing agent) and Quell Oxidation Number of a in c105- x + 3(-2) = -2 20 = 6-1 =) +5 (c) +5 Ans. Que!12 ♡ LiOH(aq) + HNO3(aq) + LINOZ (aq) + H2011) Ansa Acid-Base Neutralization reactien is when an acid anel a base React to form water and a Salt and involve the combinatich of it and onione generate weiter. LiOH (stong base) anel (HND) is acid ton cull.13 ) Fe is most likely to be a good conducter. Because metal are good conducter in electricity. (E) Fe Ans.