CHEMISTRY CLASS-10TH (MCQs=1504)

Sodium carbonate is used in laundries as a
a) purification                                     

b) cleaning agent
c) manufacturing                

d) drying agent

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…………. is used as water softner.
a) Na2CO3                                             

b) Na2SO4             
c) NaHCO3                                           

d) none of these

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Sodium carbonate is used as raw material in………….manufacturing.
a) cement                                             

b) spray
c) dye                                                    

d) glass

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In paper and leather industry……is used.
a) NaCl                                 

b) Na2CO3            
c) NaHCO3                                                 

d) none of these

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In petroleum refining………….is used.
a) Na2CO3                                            

b) NaHCO3          
c) KNO3                                

d) MgSO4

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The chemical formula of sodium carbonate is
a) Na2 SO4

b) NaHCO3          

c) Na2CO3

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