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रसायन विज्ञान प्रश्नोत्तर Chemistry Quiz -43

प्रश्न :- सीसा का निष्कर्षण मुख्यतः किस अयस्क से किया जाता है ? (A) गैलना  (B) हेमेटाइट  (C) सिनेबार  (D) ये सभी Ans:- (A) गैलना प्रश्न :- वाहनों से उत्सर्जित धुएँ में किसकी...

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