What is the correct answer?


More than 95% of __________ is present in corundum.

A. SiO2

B. Al2O3

C. CaSiO2

D. MgO

Correct Answer :

B. Al2O3

Related Questions

M10 index of coke indicates its Batch process is preferred over continuous process, when the Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure… Which of the following heat treatment processes is usually applied to… Depreciation of machines fails under the indirect expenses head. As per… Unit of surface tension in S.I. unit is Factor of safety is the ratio of the __________ stress to the working… Cast iron contains __________ percent carbon. Which of the following metals cannot be hot worked at room temperature? Atomic __________ is a whole number for an element. Which of the following is the correct nature of shear stress distribution… With increase in temperature, the surface tension of water __________ is not a case hardening process. Laser welding is widely employed in the __________ industries. The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10-16… Pick out the wrong statement. Increasing sulphur content in pig iron tends to make it Case hardening of a material is __________ remains constant during the adiabatic cooling of moist air. Which of the following equipments is used for liquid dispersion? In a totally irreversible isothermal expansion process for an ideal gas,… In multipass welds, shot peening is done after each pass to When dry bulb temperature & wet bulb temperature of moist air is the same,… High relative humidity decreases the evaporative process and as the temperature… Lap joints are preferred over butt joints in soldering/brazing, because… Pick out the wrong statement. Coating thickness in case of galvanising of steel sheet generally corresponds… The minimum and the maximum number of members required to form a Private… Brass parts with high residual tensile stress at the surface are susceptible… Non-ferrous alloys used for making cutting tools need not have high