Chemistry SEC 3 Past Paper Quiz PDF

Name: Code: Grade: /10 chemistry – SEC 3 1)which of the solution has pH above 7? a)1.5 M NH4CL B)0.2M HCN C)0.3M KCN D)1.2M CH3COOH 2)which of the following shows the type of NaH2PO4 solution and it is PH? a)A...

Name: Code: Grade: /10 chemistry – SEC 3 1)which of the solution has pH above 7? a)1.5 M NH4CL B)0.2M HCN C)0.3M KCN D)1.2M CH3COOH 2)which of the following shows the type of NaH2PO4 solution and it is PH? a)Acidic, PH is below 7 b)Neutral, PH equals 7 c)Basic, PH is below7 d)Basic, PH is above 7 3)on mixing two equal volumes of nitric acid and potassium hydroxide solution, both of 0.25 M ,a solution is formed which is ……….. a)Neutral b)acidic c)alkaline d)amphoteric 4)NH4NO2 solution is acidic inspite of being produced from neutralization of a weak acid with a weak base ,as….. a)Ka > Kb b)Ka+ Kb = 14 c)ka< kb d)Ka = kb 5)which of the following equally concentrated solution has the lowest pH? a)Nacl (aq) b)NaCN (aq) c)Na3BO3 (aq) d)Na2So3 (aq) 6)the solubility degree of CUS salt in water is estimated in the unit ……. a)mL/s b)g/^c c)mol/L d)^c/mol 7)the solubility degree of copper (II) iodate Cu(IO3)2 is 3.3 X 10-3 M at a certain temperature. What is Ksp at the same temperature ? a)1.4x10-7 b)1.1x10-5 c)3.3x10-3 d)5.1x10-1 8)which of the following salts from a basic solution ? a)KNO3 b)Mgcl2 c)NH4cl d)NaNo2 9)if the solubility degree of aluminum hydroxide AL(OH)3 in water equals 1x10 -6 mol\L calculate the solubility product. (2Marks)