railway RRB Technician Grade 3 Mock Test 2024 Chemistry General Principles And Process of Isolation of Elements Metals and Its Ores

निम्नलिखित में से कौन सा तांबे का अयस्क है?

1
क्रोमाइट
2
मैलाकाइट
3
हेमेटाइट
4
मैग्नेटाइट
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