Chemical Equilibrium XI Year BIEK( Multiple choice questions)

Chapter:  Chemical Equilibrium

Multiple choice questions

            i) Which of the following is correct solubility product expression for Al₂(SO₄₎₃   

                        a) Ksp =[Al³⁺]  [SO₄^2-]           b) [Al³⁺]² [SO₄^2-]³ 

                       c) [2Al³⁺]²  [3SO₄^2-] ³                         d) [2Al³⁺]  [3SO₄^2-] 

ii)  Which of the following equation that describes the relationship between the solubility product for MgF₂ and the solubility    

                        a) Ksp= 2S                              b) Ksp= S²

                       c) Ksp= S⁴                   d) Ksp= 16S⁴

iii) Which is more soluble salt

                        a) Ag₂S (Ksp= 6.3x10^-50)            b) Pb₃ (PO₄) ₂   (Ksp= 8.0x10^-43)

                       c) HgS   (Ksp= 4x10^-53)          d) Ca₃ (PO₄) ₂   (Ksp= 6.3x10^-29)

           

            iv) Which salt is less soluble

                        a) Ag₂S (Ksp= 6.3x10^-50)            b) Pb₃ (PO₄) ₂   (Ksp= 8.0x10^-43)

                       c) HgS   (Ksp= 4x10^-53)          d) Ca₃ (PO₄) ₂   (Ksp= 6.3x10^-29)

           

            v) Precipitation of salt will occur  when product of ionic concentration 

                        a) Ksp = product of ionic concentration 

                        b) Ksp < product of ionic concentration 

                        c) Ksp≥ product of ionic concentration 

                        d)Ksp > product of ionic concentration 

           

            vi) The expression of  Ksp is [Ca²⁺][PO₄^3-]  the equilibrium state of salt

                        a) Ca₃(PO₄)₂     ↔ Ca²⁺    +   PO₄^3-           b) Ca₃(PO₄)₂     ↔3 Ca²⁺       +  PO₄^3-   

                        c) Ca₃(PO₄)₂     ↔ Ca²⁺       +    2PO₄^3-    d) Ca₃(PO₄)₂     ↔3 Ca²⁺ +2 PO₄^3-   

                   

                    vii) What is the effect of adding a strong acid (HCl) solution that contain

                  H₂S  ↔   2H⁺   +  S^2-

                        a) the concentration of sulphide ion   increase

                        b) the concentration of sulphide ion  decrease

                        c ) No effect of concentration of sulphide  ion

                        d)  dissociation of HCl  will increase

            viii) The Cation of III-group precipitation as

                        a) Sulphide     b) Carbonate

                        c) Hydroxide   d) Chloride

           

            ix) The Cation  of  II and IV precipitate as  

                        a) Chloride      b) Carbonate

                        c) Hydroxide   d) Sulphide

           

            x)The Cation of I A group precipitate as

                        a) Hydroxide   b) Carbonate

                        c) Chloride      d) Sulphide