Science · Chemistry
रोल्ड गोल्ड का संघटन क्या है?
- 190% ताँबा एवं 10% एल्यूमिनियम✓
- 2शुद्ध सोना
- 3सोने की परत चढ़ाई गई आधातु
- 4सोने और चांदी की एक धातु है
सही उत्तर देखें
90% ताँबा एवं 10% एल्यूमिनियम
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