Chemistry · Non-metals
निम्नलिखित में से सबसे कठोर ज्ञात अधातु कौन-सी है?
- 1सल्फर (Sulphur)
- 2ग्रेफाइट (Graphite)
- 3कोयला (Coal)
- 4हीरा (Diamond)✓
सही उत्तर देखें
हीरा (Diamond)
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