Are you able to answer this Secondary Chemistry Tuition Question? (Part 4)

21        Three elements X, Y and Z have consecutive, increasing proton numbers.

If element X is a noble gas, what will be the symbol for the ions of element Z in its compounds?

 

A          Z²⁻                                            B          Z⁺

C          Z²⁺                                            D          Z³⁺

 

 

22        Iron is extracted in the blast furnace using the raw materials haematite, coke and limestone.

Which substance undergoes thermal decomposition?

 

A          limestone

B          carbon dioxide

C          haematite

D          slag

 

23        In which test-tube is the iron nail most likely to rust?

24        Which metal is used in the sacrificial protection of iron pipes?

 

A          copper

B          lead

C          magnesium

D          sodium

 

 

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Did you answer the Secondary Chemistry Tuition Question correctly?

 

21.C

22.A

23.A

24.C

 

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