CHEMISTRY CLASS-10TH (MCQs=1504)

The process in which the oxide ore in the fused is reduced with reducing agents such as coke to get metal is called………….
a) roasting                                            

b) smelting                          

c) extraction                                        

d) distillation

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In smelting process, the roasted ore is mixed with………and smelted into blast furnace.
a) Coke                                 

b) sand  
c) both a & b                                       

d) none of these

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FeO_(s) +SiO_2(s)c……………
a) FeSiO₂

b) FeSiO₃                             

c) SO₃    
d) SiO₃

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………. Slag.
a) iron silicate                    

b) Silica 
c) calcium carbonate                         

d) Iron Oxide

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The general formula of iron silicate is ………
a) FeO                                                   

b) FeS    
c) FeSiO3                                              

d) CuO

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The cuprous sulphide in the blast furnace also oxidizes and form……………..
a) Cu2O

b) FeS                    

c) FeO

d) SO2

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