[{"id":1066491,"question":"The oxidation number of sulfur in H2SO4 is","choices":[{"text":"+2","value":"A"},{"text":"+4","value":"B"},{"text":"+6","value":"C"},{"text":"+8","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":1066490,"question":"Oxidation numebrof oxygen in H2O","choices":[{"text":"1","value":"A"},{"text":"-2","value":"B"},{"text":"0","value":"C"},{"text":"+1","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066489,"question":"Which species is educed in the followig rection ? Zn + Cu --------- Zn","choices":[{"text":"Cu2+","value":"A"},{"text":"Zn","value":"B"},{"text":"Cu","value":"C"},{"text":"Zn3+","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066488,"question":"Which of the following changes wold typically lead to an incresse in he rate of electrolysis.","choices":[{"text":"Decreasing ghe concentration of the electrolyte","value":"A"},{"text":"Incressing the distance between the electrodes","value":"B"},{"text":"Decressing the surface area of the electrolytic cell","value":"C"},{"text":"Increasing the current passed though the electroytic cell","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066487,"question":"A positive value for the standared electrode potential of a metal ion metal half cell indicate that","choices":[{"text":"The metal is stong reducing agent","value":"A"},{"text":"The metal ion is redily oxidized","value":"B"},{"text":"The metal ion is redily reduced","value":"C"},{"text":"The metal will readily displace hydrogen from dilute acids.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":1066486,"question":"The principle of measuring DO by Wrinkler's Method is based on.","choices":[{"text":"Iodimetry","value":"A"},{"text":"Iodometry","value":"B"},{"text":"Acid Bse titration","value":"C"},{"text":"Complexometry","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066485,"question":"The experimental determination of Avogadro's numebr through electrolysis typically involves measuring ","choices":[{"text":"The current and voltage applied","value":"A"},{"text":"The mass of the substance deposited or liberated by a konown charge","value":"B"},{"text":"The conductivity of the electrolytic solution","value":"C"},{"text":"The temperature changes duirng electrolysis","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066484,"question":"In an electrolysis exprement if a charge 96,500 Coluombs is passed trough a solution, the amount of substance liberated or deposited at the electrode is directly relatd to.","choices":[{"text":"Mass numebr of the ion","value":"A"},{"text":"One mole of electrons being transferred","value":"B"},{"text":"Avogadro's nmber of ions being discharged","value":"C"},{"text":"Standrd electrode potentil of the metal iion","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066483,"question":"If salt bridge in not used, between twohalf cells in a Galvanic cell, than the voltage.","choices":[{"text":"Decrease slowly","value":"A"},{"text":"Decrease repidly","value":"B"},{"text":"Does not change","value":"C"},{"text":"Drope to zero","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":1066482,"question":"If Zn -Cu galvanic cell works ideally after complete discharge, both comparatments will have","choices":[{"text":"CuSO4 Solution","value":"A"},{"text":"Zn SO4 Solution","value":"B"},{"text":"Cu Ions","value":"C"},{"text":"Zn Solid","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066481,"question":"The salt brige allows tranfer of ........in Zn -Cu voltaic cell","choices":[{"text":"SO4 Ions","value":"A"},{"text":"Zn2 ions","value":"B"},{"text":"Both ","value":"C"},{"text":"None of thes","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066480,"question":"Which of the following metals would most raadily displace hydrogen gas from dilute acids.","choices":[{"text":"Copper","value":"A"},{"text":"Silver","value":"B"},{"text":"Magnesium","value":"C"},{"text":"Platinum","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":1066479,"question":"The activity series of meals arranges metals in order of their.","choices":[{"text":"Atomic mass","value":"A"},{"text":"Density","value":"B"},{"text":"Ease of oxidation","value":"C"},{"text":"Ease of reduction ","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":1066428,"question":"The solubility product of AgCl is 2.0 x 10<sup>-10</sup> mol2 dm-6. The maximum concentration of Ag+ ions in the solution is.","choices":[{"text":"2.0 x 10<sup>-10</sup> mol dm<sup>-3</sup>","value":"A"},{"text":"1.41 x 10<sup>-5</sup> mol dm<sup>-3</sup>","value":"B"},{"text":"1.0 x 10<sup>-10</sup> mol dm<sup>-3</sup>","value":"C"},{"text":"4.0 x 10<sup>-20</sup> mol dm<sup>-3</sup>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066427,"question":"If the pH of solution is 11, what is the [OH-]concentratio in the solution.","choices":[{"text":"1 x 10<sup>-3</sup> M","value":"A"},{"text":"1 x 10<sup>-11</sup> M","value":"B"},{"text":"1 x 10<sup>-2</sup> M","value":"C"},{"text":"1 x 10<sup>-14 M</sup>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066426,"question":"The solubility prodct of Pb SO4 is","choices":[{"text":"1.6 x 10<sup>-8</sup>","value":"A"},{"text":"1.4 x 10<sup>-4</sup>","value":"B"},{"text":"1.6 x 10<sup>-6</sup>","value":"C"},{"text":"1.6 x 10<sup>-2</sup>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066425,"question":"In a titration, the equivalence point is when","choices":[{"text":"No acid left","value":"A"},{"text":"pH = 7","value":"B"},{"text":"Moles of acid= moles of base","value":"C"},{"text":"Buffer forms","value":"D"},{"value":"E"}],"correctAnswer":3}]