TS EAMCET · Chemistry · Electrochemistry

On passing a current of $1.2 A$ through a solution of salt of copper for $40 \min, 0.96 g$ of copper was deposited. The equivalent weight of copper in $g$ is

A $21.2$
B $31.75$
C $63.5$
D $15.9$

Verified Solution

Answer & Solution

Correct Answer

(B) $31.75$

Step-by-step Solution

Detailed explanation

According to Faraday's first law of electrolysis, the mass of the substance deposited or liberated is directly proportional to charge passed through the circuite. W=Eit96500 E =Equivalent weight i=current in amperes t=time in seconds…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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On passing a current of 1.2 A through a solution of salt of copper for 40 min,0.96 g of copper was deposited. The equivalent weight of copper in g is

Step-by-step Solution

On passing a current of $1.2 A$ through a solution of salt of copper for $40 \min, 0.96 g$ of copper was deposited. The equivalent weight of copper in $g$ is