A. Mercury
B. Sodium
C. Calcium
D. Magnesium
Related Mcqs:
- Glass reacts with___________________?
A. H2SO3
B. HF
C. HNO3
D. K2Cr2O7 - Which of the following metals cannot be hot worked at room temperature ?
A. Zinc
B. Nickel
C. Lead
D. Tin - Which of the following metals is the most prone to work hardening ?
A. Brass
B. Aluminium
C. Copper
D. Lead - In extrusion of metals, which of the following statement is true ?
A. Speed of the extruded material is same as that of ram speed
B. Redundant work is a function of the die angle
C. Relative motion between the billet surface and the container wall is always present
D. Hollow ram is used for indirect extrusion - Which of the following metals is not subjected to electrolytic refining/purification ?
A. Copper
B. Zinc
C. Tin
D. Aluminium - Corrosion of metals cannot be prevented by its__________________?
A. Tempering
B. Chromising
C. Aluminising
D. Alloying - Change in volume of metals from absolute zero temperature to their melting points is___________________?
A. Almost same for all metals
B. Different for different metals
C. Less for low melting point metals
D. Less for high melting point metals - Super conduction in metals is observed at a temperature of ________________ °K?
A. <100
B. >100
C. About 273
D. About 373 - The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) ?
A. T
B. 1/T
C. T2
D. 1/T2 - Pick out the wrong statement about coating/electroplating of metals ?
A. Phosphate coating is used as an excellent base for paints & enamels
B. Phosphate coating is less corrosion resistant than chromate coating
C. The base metal to be electroplated is normally made the cathode of the electrolytic cell and
coating metal is made the anode
D. Calorising is the process of coating steel with chromium
