Highest melting (m.p = `3070^circ`C) oxide refractory is Options: A . &nbspalumina B . &nbspthoria C . &nbspzirconia D . &nbspmagnesia

Question

Highest melting (m.p = `3070^circ`C) oxide refractory is

Options:

A . alumina

B . thoria

C . zirconia

D . magnesia

Answer: Option B

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