Q.

What are the constituents of the alloy called German Silver?


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a

copper and nickel.

b

copper, and zinc. 

c

zinc and nickel.

d

copper, zinc and nickel.

answer is C.

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Detailed Solution

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Concept: Combining two or more metals results in an alloy. Some alloys include non-metals along with metals. German silver is an alloy and has a Silvery white appearance.
Copper, zinc, and nickel are the main components of German Silver. Its composition differs as: Copper 50%-61.6% , Zinc 19%-17% and nickel 21.1%-30%.
German silver contains nickel and zinc, therefore when it comes into touch with skin, it may result in rashes, irritation, dry patches, or skin redness. German silver cannot be used in jewellery despite seeming silvery white because of this.German silver turns black when left in the dark for an extended period of time. This results from the oxidation process.
Hence, the correct option is option 3.
 
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