Which is an acidic refractory ?
Which is an acidic refractory ?
A. Magnesite
B. Dolomite
C. Fireclay
D. Chrome magnesite
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At higher temperature, molal heat capacities of most of the gases (at constant pressure) ____________ with increase in temperature?
At higher temperature, molal heat capacities of most of the gases (at constant pressure) ____________ with increase in temperature?A. Increases
B. Decreases
C. Remains unchanged
D. Increases linearlyHigh porosity refractory bricks have________________?
High porosity refractory bricks have________________?A. Poor resistance to the penetration of molten slag, metal & flue gases
B. Poor heat conductivity & low strength
C. Better thermal spalling resistance
D. All A., B. and C.Maximum alumina content in high alumina refractory can be as high as ____________ percent?
Maximum alumina content in high alumina refractory can be as high as ____________ percent?A. 30
B. 50
C. 70
D. 90If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will_________________?
If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will_________________?A. Be reduced to 1/4th
B. Increase four times
C. Increase two times
D. None of theseOsmotic pressure of the solution can be increased by_________________?
Osmotic pressure of the solution can be increased by_________________?A. Decreasing its temperature
B. Increasing the volume of the vessel containing the solution
C. Diluting the solution
D. None of theseKopp’s rule is useful for the determination of_____________________?
Kopp’s rule is useful for the determination of_____________________?A. Molal heat capacities of gases
B. Heat capacities of solids
C. Activation energy
D. Heat capacities of gases