Thoria is an expensive refractory material and is radioactive in natur – McqOptions

MCQOPTIONS

1.	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.
C.	insulating bricks.
D.	crucibles used for melting of high purity metals.
Answer» E.

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