4 mc question

16) For a chemical cell, there are two half-cellsHalf-cell A contains zinc metal and zinc nitratesolutionHalf-cell B contains silver and silver nitratesolutionThe two half-cells are linked by an externalcircuit and a salt bridgeWhich of the following is INCORRECT?A. Zinc is anodeB. Reduction occurs at the silver electrodeC. The salt bridge can be made by soaking a pieceof filter paper with dilute sodium chloride solutionD. Anions in the salt bridge move towards the zincnitrate solution. 17) For a chemical cell, there are two half-cellsHalf-cell A contains nickel metal and nickel(II)sulphate solutionHalf-cell B contains cadmium and cadmium sulphatesolutionThe two half-cells are linked by an externalcircuit and a salt bridgeWhich of the following is correct?A. Oxidation occurs at the nickel electrodeB. Cadmium electrode is the cathodeC. The concentration of cadmium ion in cadmiumsulphate solution increasesD. Nickel(II) sulphate solution can be stored in acadmium can 18) Which of the following statements concerningMnO2 in zinc-carbon cell is correct? (i) Itacts as an oxidizing agent (ii)The oxidation number of MnO2 changes from +4 to +2 over disvharge (iii)MnO2 is used to remove the hydrogen produced in the cellA. i and iiB. i and iiiC. ii and iiiD.i, ii and iii 19) For a chemical cell, there are two half-cellsHalf-cell A contains carbon and sodium bromidesolutionHalf-cell B contains carbon and acidified potassiumdichromate solutionThe two half-cells are linked by an externalcircuit and a salt bridgeWhich of the following is correct?A. Species being oxidized: Cr2O7 2- ; species beingreduced: Br-B. Species being oxidized: Br- ; species beingreduced: Cr2O7 2-C. Species being oxidized: K+ ; species beingreduced: Na+D. Species being oxidized: Na+ ; species beingreduced: K+