Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of______________?

Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of______________?

(A) Segar cones

(B) Muffles for muffle furnaces

(D) Crucibles used for melting of high purity metals

Submitted By :Ali Uppal

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