Chemistry · Non-metals
पेंसिल में 'लेड' के रूप में किस पदार्थ का उपयोग किया जाता है?
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- 2एल्युमिनियम
- 3चारकोल
- 4मैंगनीज डाइऑक्साइड
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ग्रेफाइट
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