Stoichiometry Mcqs for Chemical

Q.  Pick out the wrong statement?

a. Refractories used in muffle furnace should have low thermal conductivity
b. The electrical resistivity of refractories drops rapidly with rise in temperature
c. For reducing spalling tendency, the refractory should be well fired and its porosity should be more
d. Refractoriness under load (RUL) of a refractory is always less than its refractoriness


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