Balancing Equations - Quiz - gcsescience.com.


1. In the formula KCl there are

a) 1 potassium and 2 chlorines

b) 2 potassiums and 1 chlorine

c) 1 potassium and 1 chlorine

d) 2 potassiums and 2 chlorines

 

2. The balanced equation for the reaction
      of potassium with chlorine is

a) K + Cl > KCl

b) K + Cl2 > KCl2

c) K + Cl2 > 2KCl

d) 2K + Cl2 > 2KCl

 

3. In the formula MgBr2 there are

a) 2 magnesiums and 2 bromines

b) 1 magnesium and 2 bromines

c) 2 magnesiums and 1 bromine

d) 1 magnesium and 1 bromine

 

4. The balanced equation for the reaction
      of magnesium with bromine is

a) Mg + Br > MgBr2

b) Mg + Br2 > MgBr2

c) 2Mg + 2Br > MgBr2

d) 2Mg + Br > MgBr2

 

5. In the formula Na2O there are

a) 2 sodiums and 1 oxygen

b) 2 sodiums and 2 oxygens

c) 1 sodium and 1 oxygen

d) 1 sodium and 2 oxygens

 

6. The balanced equation for the reaction
      of sodium with oxygen is

a) 2Na + O2 > Na2O

b) 2Na + O > Na2O

c) 4Na + O2 > 2Na2O

d) Na + O2 > Na2O

 

7. The balanced equation for the reaction
of iron oxide with carbon monoxide (in the blast furnace) is

a) Fe2O3 + 2CO > Fe + CO2

b) Fe2O3 + 2CO > 2Fe + 2CO2

c) Fe2O3 + 3CO > 2Fe + 3CO2

d) 2Fe2O3 + 4CO > 3Fe + 4CO2

 

                       
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