Chemistry - Solid State Question with Solution | TestHub

(a) In semiconductor there is Band gap is present

(b) $\mathrm{T}\uparrow$ conductivity $\uparrow$ (semiconductor) $\mathrm{T}\uparrow$ conductivity $\downarrow$ (metal)

(c) Ferromagnetic substance become paramagnetic on heating at specific temperature known as curie temperature

(d) Ferromagnetic substance does not lose their magnetism in absence of external magnetic field because there domain are aligned so they become permanent magnet