1) NaCl is formed by which ions? a) Na+ , Cl2- b) Na+, Cl- c) Na2+, Cl2- 2) Al2O3 is formed by which ions? a) Al3-, O2+ b) Al2+, O3- c) Al3+, O2- d) Al3+, O+2 3) Calcium Chloride is formed by which ions? a) Ca2+,Cl- b) Ca-2, Cl- c) Ca+3, Cl-2 d) Ca+, Cl-2 4) Lead(II) Bromide is formed by which ions? a) Pb3+, Cl- b) Pb2+, Cl- c) Pb3+, Cl2- d) Pb2-,Cl- 5) What is the chemical formula of potassium chloride? a) PCl b) PCl2 c) KCl d) KCl2 6) What is chemical formula of Calcium hydroxide? a) Ca(OH)2 b) Ca2OH c) CaOH2 d) Ca2OH

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