MHT CET Chemistry question
An inaccurate ammeter and silver coulometer is connected in series in an electric circuit through which a constant direct current flows. If ammeter reads 0.6 ampere throughout one hour, the silver deposited on coulometer was found to be 2.16 g. What % error is in the reading of ammeter? [Assume 100% current efficiency].
Answer: (D)
Solution
Charge from coulometer = (2.16/108) × 96500 = 1930 C, so true current = 1930/3600 = 0.536 A while the ammeter reads 0.6 A;
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