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NEET UG CHEMISTRY MCQ: SOLID STATE

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Which arrangement of electrons leads ferromagnetism?
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Correct option: A
↑↑↑↑\uparrow \mathrm{ } \uparrow \mathrm{ } \uparrow \mathrm{ } \uparrow
Option A (↑↑↑↑\uparrow \mathrm{ } \uparrow \mathrm{ } \uparrow \mathrm{ } \uparrow) is correct because ferromagnetism arises from the parallel alignment of electron spins in the same direction.

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Schottky defect in crystals is observed when Calculate the ionic radius of a Cs+\mathrm{C}{\mathrm{s}^ + } ion, assuming that the cell edge length for CsCl is 0.4123 nm and that the ionic radius of a CI−\mathrm{C}{\mathrm{I}^ - } ion is   0.181  nm\;0.181\,\,nm Wrong match is A molecule contains atoms AA and BB such that AA occurs at the corners of the cube and YY at the face centres. The formula of the molecule is Which species is diamagnetic ? The arrangement ABCABC……is referred to as,
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