The purpose of Smelting an ore is to________?
A. Reduce it B. Oxidize it C. Obtain an alloy D. Separate volatile impurities
Chemistry MCQs
Which Oxide of Manganese is amphoteric?
A. MnO2 B. Mn2O3 C. Mn2O7 D. MnO
A process used for the Concentration of Ore is________?
A. Roasting B. Forth flotation C. Electrolysis D. Distillation
Which metal is used as a reducing agent in Smelting______?
A. C B. Zn C. Al D. Cu
Parke’s process is used in the extraction of________?
A. Iron B. Sodium C. Silver D. Zinc
In melting of iron, which of the following reactions takes place in Bladt Furnace at 400°C- 600°C________?
A. CaO+ SiO2——> CaSiO3 B. 2FeS+3O2——–> 2Fe+ SO2 C. FeSiO3———> FeSiO3 D. Fe2O3+ 3CO——–> 2Fe+ 3CO2
Gypsum is______?
A. CaSO4 B. CaSO4.1/2H2O C. CaSO4,2H2O D. CaSO4.3H2O
Basicity of orthophosphoric acid is________?
A. 2 B. 3 C. 4 D. 5
Ce58 is a member of__________?
A. S-block B. P-block C. d-block D. f-block
Electronic Configuration of Calcium (Ca) atom may be written as________?
A. Ne, 4p2 B. Ar, 4s2 C. Ne, 4s2 D. Kr,4p2