A. Fe3C chemically
B. A compound of carbon and iron
C. Characterised by an orthorhombic crystal structure
D. All A., B. and C.
Related Mcqs:
- Metal at the top of the electromotive series is________________?
A. Least active
B. Most stable
C. Most active
D. Most noble - The softest material in Mho’s scale (for measuring hardness) is________________?
A. Talc
B. Gypsum
C. Rubber
D. None of these - Light weight metallic alloy used in aircraft industry is________________?
A. Aluminium
B. High silicon (14%) iron
C. Duralumin
D. Phosphor bronze - Kel-F is a material, which is________________?
A. Chemically known as Polychlorotrifluoroethylene (PTFE)
B. Having excellent chemical & high temperature resistance (upto 200°C)
C. Having elastomeric properties
D. All A., B. and C. - ‘Age hardening’ of duralumin is due to____________________?
A. Copper
B. Magnesium
C. Both A. & B.
D. Neither A. nor B. - Hydrochloric acid is stored in a ________________vessel?
A. Lead lined steel
B. Rubber lined steel
C. Stainless steel
D. Cast iron - Bush bearings are made of______________________?
A. Mild steel
B. Phosphorous bronze
C. White metal alloys
D. None of these - Which of the following has a very high carbide forming tendency in steels ?
A. Silicon
B. Chromium
C. Nickel
D. Vanadium - Gun metal is an alloy of_________________________?
A. Nickel, tin and copper
B. Copper, tin and zinc
C. Copper, phosphorus and nickel
D. Manganese, phosphorus and nickel - Which of the following is the softest material ?
A. Quartz
B. Calcite
C. Corundum
D. Fluorite
