General Science · Alloys and Composition
रोल्ड गोल्ड (Rolled Gold) के विशिष्ट अवयव क्या हैं?
- 1चांदी (90%) + तांबा (10%)
- 2सोना (50%) + तांबा (50%)
- 3तांबा (70%) + जस्ता (30%)
- 4तांबा (90%) + एल्युमीनियम (10%)✓
सही उत्तर देखें
तांबा (90%) + एल्युमीनियम (10%)
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