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mnsoomro
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Ce58 is a member of__________?
A. S-block B. P-block C. d-block D. f-block Submitted by :- Jamil Ahmed
Gypsum is______?
A. CaSO4 B. CaSO4.1/2H2O C. CaSO4,2H2O D. CaSO4.3H2O Submitted by :- Jamil Ahmed
In melting of iron, which of the following reactions takes place in Blast Furnace at 4°C- 6°C________?
A. CaO+ SiO2——> CaSiO3 B. 2FeS+3O2——–> 2Fe+ SO2 C. FeSiO3———> FeSiO3 D. Fe2O3+ 3CO——–> 2Fe+ 3CO2 Submitted by :- Jamil…
Parke’s process is used in the extraction of________?
A. Iron B. Sodium C. Silver D. Zinc Submitted by :- Jamil Ahmed
Which metal is used as a reducing agent in Smelting______?
A. C B. Zn C. Al D. Cu Submitted by :- Jamil Ahmed
A process used for the Concentration of Ore is________?
A. Roasting B. Forth flotation C. Electrolysis D. Distillation Submitted by :- Jamil Ahmed
Which Oxide of Manganese is amphoteric?
A. MnO2 B. Mn2O3 C. Mn2O7 D. MnO Submitted by :- Jamil Ahmed
The purpose of Smelting an ore is to________?
A. Reduce it B. Oxidize it C. Obtain an alloy D. Separate volatile impurities Submitted by :- Jamil Ahmed
In borax bead test which compound is formed_________?
A. Ortho borate B. Meta borate C. Double oxide D. Tetra borate Submitted by :- Jamil Ahmed
Percentage of lead in lead pencil is________?
A. Zero C. 8 B. 2 D. 7 Submitted by :- Jamil Ahmed