Question

9. Based on the solubility rules, which one of the following compounds should be insoluble in water? A) Na SO B) BaSO C) CuSO. D) MgSO E) Rb SO 10. Identify the reducing agent in the following chemical reaction. Cd + NiO2 + 2H2O → Ca(OH)2 + Ni(OH)2 A) Cd B) NiO2 c) H2O D) Ca(OH)2 E) Ni(OH)2 11. The oxidation number of Cl in CIO, is A) -1 B) +7 C) +5 D) +3 E) None of the above. 12. Which of the following represents an acid-base neutralization reaction? A) 2Al(s) + 3H2SO4(aq) + Al(SO4)(aq) + 3H2(g) B) SO2(g) + H2O(l) H2SO3(g) C) LiOH(aq) + HNO3(aq) → LINO3(aq) + H2O(l) D) 2K Br(aq) + Cl:(8) 2KCl(aq) + Brz(1) E) CaBr (aq) + H2SO4(aq) CaSO4(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

9. B) BaSO₄

10. C) H₂O

11. C) +5

12. C) LiOH + HNO₃ $\rightarrow$ LiNO₃ + H₂O

13. E) Fe