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from","choices":[{"text":"Nickel cadmium cells","value":"A"},{"text":"Lead accumulator","value":"B"},{"text":"Fuel Cell","value":"C"},{"text":"Alkaline battery","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252940,"question":"Rusting of iron metal Fe occurs when Fe gets converted into Fe2O3 What happen with Fe?","choices":[{"text":"F'e is neutralized","value":"A"},{"text":"Fe is sublimed","value":"B"},{"text":"Fe is reduced","value":"C"},{"text":"Fe is oxidized","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252939,"question":"Which one of the following elements is the strongest reducing agent?","choices":[{"text":"Chlorine","value":"A"},{"text":"Sodium","value":"B"},{"text":"Magnesium","value":"C"},{"text":"Aluminium","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252938,"question":"Which of the following metal does not liberate hydrogen on reaction with acid?","choices":[{"text":"Mg","value":"A"},{"text":"Pt","value":"B"},{"text":"Zn","value":"C"},{"text":"Ca","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252937,"question":"Stronger is the oxidizing agent, stronger is the","choices":[{"text":"emf of cell","value":"A"},{"text":"Oxidation potential","value":"B"},{"text":"Reduction potential","value":"C"},{"text":"Reduction potential","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252936,"question":"During oxidation process, oxidation number of an element","choices":[{"text":"Decreases","value":"A"},{"text":"Increases","value":"B"},{"text":"Remains constant","value":"C"},{"text":"Both a and b","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252935,"question":"Coinage metals Cu, Ag and Au are the least reactive because they have","choices":[{"text":"Negative reduction potential","value":"A"},{"text":"Negative oxidation potential","value":"B"},{"text":"Positive reduction potential","value":"C"},{"text":"Positive oxidation 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E°red","choices":[{"text":"N","value":"A"},{"text":"F","value":"B"},{"text":"O","value":"C"},{"text":"CI","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252923,"question":"If a salt bridge is removed from two half cells the emf is","choices":[{"text":"Increased","value":"A"},{"text":"Decreased","value":"B"},{"text":"Dropped to zero","value":"C"},{"text":"Electrodes will be reversed","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252922,"question":"SHE acts as anode when connected with Cu electrode but act as cathode with Zn electrode","choices":[{"text":"Zn has less reduction potential than hydrogen and Cu","value":"A"},{"text":"<div>Zn has high reductionl potential than hydrogen</div><div>and Cu</div>","value":"B"},{"text":"<div>Zn is below electrochemical series than hydrogen and Cu</div><div><br></div>","value":"C"},{"text":"Zn has least tendency to lose electron","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252921,"question":"The electrochemical series is based on","choices":[{"text":"pH scale","value":"A"},{"text":"Redox scale","value":"B"},{"text":"Hdrogen scale","value":"C"},{"text":"Arrhenius scale","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252920,"question":"The potential of SHE is taken as zero which is avalue","choices":[{"text":"Reference","value":"A"},{"text":"Arbitrary","value":"B"},{"text":"Exact","value":"C"},{"text":"Experimental","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252919,"question":"The working condition/s for SHE","choices":[{"text":"1atm pressure","value":"A"},{"text":"1M H-solution","value":"B"},{"text":"298K temperature","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252918,"question":"The electrochemical reactions occurring at both the electrodes along with the electrolytic conduction constitute","choices":[{"text":"Oxidation","value":"A"},{"text":"reduction","value":"B"},{"text":"Redox 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