German silver is an alloy of

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Q: 98 (CDS-I/2007)
German silver is an alloy of
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question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,77,91,22,25,44,77

keywords: 

{'german silver': [0, 0, 2, 1], 'silver': [0, 0, 0, 1], 'copper zinc': [0, 0, 1, 0], 'alloy': [0, 0, 3, 5], 'zinc': [1, 0, 0, 2], 'nickel': [1, 0, 0, 0], 'copper': [1, 0, 1, 1], 'gold': [8, 1, 7, 14]}