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Solve the following.
Nandini wants to electroplate her bracelet with silver. She gives the bracelet to an artist. After…
Nandini wants to electroplate her bracelet with silver. She gives the bracelet to an artist.
(a)[1.5]
After electroplating she gets the information that 1.6117g of the metal is deposited when electric current of 0.2 ampere is passed for 2 hours. How will she make the confirmation that the metal deposited is silver by using the data?
(b)[1.5]
Which law is applicable to solve the problem?
Answer
Answer (a)
Official answer key$w = ZIt$
$1.6117=\frac{\text{At. mass}}{\text{Valency}\times 96500}\times 0.2\times 3600\times 2$
$1.6117=\frac{\text{At. mass}}{1\times 96500}\times 0.2\times 3600\times 2$
Atomic mass = 108 g
The deposited metal is silver.
Final answer: 108 g
Answer (b)
Official answer keyFaraday's first law of electrolysis.
From ISC 2025 Practice Chemistry, question 72.