The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is ______________ °C?
Correct answer: B. 1127
- A. 768
- B. 1127
- C. 1359
- D. 1480
Explanation
Cobalt loses ferromagnetism at its Curie temperature, which is approximately 1120 to 1127 °C. Above this temperature it becomes paramagnetic, making 1127 °C the matching option.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Chemical Process Principles
2,710 free Chemical Process Principles MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Chemical Process Principles questions
The product out from a cupola is called ____________________?
In the blast furnace, incorporation of water vapour in the blast gives the following effect ?
______________________ iron is produced by the annealing of white cast iron?
Which of the following is the largest quantum of pressure ?
The Al2O3 content of cryolite in Hall-Heroult cell is maintained between _______________ percent ?
Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical smog ?