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Rochelle salt is ferroelectric only in the Temperature range 255 K to 296 K.

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Rochelle salt is ferroelectric only in the Temperature range 255 K to 296 K.

(a) True

(b) False

I had been asked this question during an interview.

The origin of the question is Ferroelectricity in section Dielectrics of Engineering Physics II
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1 Answer

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Correct option is (a) True

The explanation: Rochelle salt has a unique property that is ferroelectric only in the temperature range of 255 K to 296 K. Other than this, the structure is orthorhombic while the structure is monoclinic in the ferroelectric phase.
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