A) Becomes soft
B) Becomes hard and brittle
C) Is covered with a thin film of\[F{{e}_{3}}{{O}_{4}}\]
D) Becomes liquid
Correct Answer: A
Solution :
When the quenched steel is heated to the temperature below red hot and then allowed to cool slowly, it becomes softer and this process is known a 'Annealing'. Hence, the correct option is (a).
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