A. No
B. Acid
C. Basic
D. Neutral
Related Mcqs:
- The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the _____________ of the slag ?
A. Fluidity
B. Basicity
C. Acidity
D. Viscosity - Which of the following is an undesirable property of slag produced during the Pyrometallurgical method of metal extraction from its ore ?
A. High fusibility & fluidity
B. High thermal conductivity
C. Low density
D. High chemical activity - Electrometallurgical methods of metal extraction is normally used for those metals___________________?
A. Whose oxide/ore is not reduced by carbon
B. Which fall in the category of alkali & alkaline earth metals
C. Which stands higher in the electrochemical series of the metal
D. All A, B. & C. - Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting) ?
A. V/A
B. V/A2
C. V2/A
D. V2/A2 - Electrometallurgy is not involved in the extraction of ___________________ from its ore?
A. Aluminium
B. Tin
C. Lead
D. Both B. & C. - Yield strength of a polycrystalline metal with an average grain size „d’, is proportional to ____________________?
A. d1/2
B. d-1/2
C. d
D. d-1 - ____________________ metal is used as a bearing liner material?
A. Pewter
B. White
C. Babbitt
D. Gun - In “Imperial Smelting Process” for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following _______________________?
A. Jet of water at high pressure
B. Blast of air
C. Mixture of water and air
D. Rain of molten lead - Matte smelting is used in the extraction of_____________________?
A. Lead
B. Zinc
C. Aluminium
D. Copper - Diffusion co-efficient of a metal in a solid solution depends upon its ?
A. Composition
B. Temperature
C. Both A. & B.
D. Neither A. nor B.
