Chemistry · Metallurgy and Alloys
रोल्ड गोल्ड (Rolled Gold) में मुख्य घटक क्या होते हैं?
- 190% एल्यूमिनियम तथा 10% जस्ता
- 250% सोना तथा 50% ताँबा
- 380% ताँबा तथा 20% जस्ता
- 490% ताँबा तथा 10% एल्यूमिनियम✓
सही उत्तर देखें
90% ताँबा तथा 10% एल्यूमिनियम
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