CHEMISTRY CLASS-10TH (MCQs=1504)

CuO is a………..
a) oxide of nitrogen            

b) oxide of carbon
c) oxide of oxygen                             

d) metal oxide

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When sulphuric acid and calcium oxide react to form……… and water.
a) calcium sulphate
b) calcium carbonate         

c) phosphoric acid
d) magnesium chloride

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The chemical formula of calcium sulphate is…
a) CaSO4                                              

b) CuSo4
c) H2So4                                

d) CSO4

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When HCl and Na2CO3 react to form NaCl , H2O and…………
a) Na                     

b) Cl                      

c) CO2

d) CO

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Na2CO3 is a formula of …………..
a) calcium carbonate 

b) sodium carbonate
c) copper sulphate              

d) sodium sulphate

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……….is the method of preparation of insoluble salt.
a) neutralization                 

b) polymerization
c) combination                    

d) precipitation

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