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| Q. |
Iron possesses BCC crystal structure up to (in degree centigrade)? |
| A. | 1539 |
| B. | 768 |
| C. | 910 |
| D. | 1410 |
| Answer» B. 768 | |
| Explanation: pure iron possess either bcc or fcc crystal structure as its temperature is increased from room temperature to its melting point. at room temperature to 910oc, it is having bcc, between 910oc and 1410oc it is having face centered cubic, and from 1410oc to its melting point (1539oc) it returns to its bcc crystal structure. | |
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