General Studies · Abrasives and Grinding
निम्नलिखित में से कौन सा सभी पदार्थों में सबसे कठोर अपघर्षक (abrasive) है?
- 1हीरा (Diamond)✓
- 2बोरॉन कार्बाइड
- 3एल्युमिनियम ऑक्साइड
- 4सिलिकॉन कार्बाइड
सही उत्तर देखें
हीरा (Diamond)
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