Science · Chemistry
काजल (लैंपब्लैक) में कार्बन की प्रतिशतता लगभग कितनी होती है?
- 135% से 40%
- 250% से 60%
- 370% से 75%
- 495% से 99%✓
सही उत्तर देखें
95% से 99%
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