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1.) A student wrote a chemical equation as shown.


Fe2O3 +

3H2 → Fe + H2O

Magnesium is listed above zinc in the activity series.


What will most likely happen when zinc particles are placed in magnesium sulfate solution?

What should the student do to balance the equation?

Add a coefficient 2 before Fe and a 3 before H2O.

Add a coefficient 3 before Fe and a 2 before H2O.

Add a coefficient 4 before Fe and a 5 before H2O.

Add a coefficient 5 before Fe and a 4 before H2O.


2.) Which of the following represents a decomposition reaction?

AC + B → AB + C

A + B + C → ABC

ABC → A + B + C

AB + CD → AC + BD


3.) Look at the four chemical reactions. Which statement identifies the reaction that is different from the rest and explains correctly why it is different? 


Reaction 1: NH4OH → NH3 + H2O

Reaction 2: 2NaCl → 2Na + Cl2

Reaction 3: CaO + H2O → Ca(OH)2

Reaction 4: 2KClO33 → 2KCl + 3O2



4.) Which of the following can be predicted using the activity series?

Speed of an acid-base reaction

Speed of a double replacement reaction

Possibility of a double replacement reaction

Possibility of a single replacement reaction


5.) Which of the following can be predicted using the activity series?

Speed of an acid-base reaction

Speed of a double replacement reaction

Possibility of a double replacement reaction

Possibility of a single replacement reaction


6.) Look at the chemical equation shown below. A, B, X, and Y represent different elements.


AX + BY → BX + AY


Which of the following types of reactions is represented by this equation? 


A single replacement reaction

A double replacement reaction

A decomposition reaction

A synthesis reaction


7.) Magnesium is listed above zinc in the activity series.


What will most likely happen when zinc particles are placed in magnesium sulfate solution?


Zinc sulfate will form.

No reaction will occur.

Zinc magnesium will form.

Solid magnesium powder will form.


8.) The reactants of two reactions are shown.


Reaction 1: Fe and HCl

Reaction 2: Cu and AgNO3


Which reaction is likely to be a redox reaction? 


Both, because the charge on chloride ions and nitrate ions will change in the respective reactions

Both, because iron and copper will form their ions in those reactions

Only Reaction 2, because one of the products will be a metal

Only Reaction 1, because one of the products will be a gas


9.) Read the following statements.


Statement 1: Mass is conserved during the reaction.

Statement 2: Sum of mass and energy is conserved during the reaction.


Which statement is true for both nuclear reaction and chemical reaction?


Only 1

Only 2

Both 1 and 2

Neither 1 nor 2



10.) Metals bond with halogens to form colorless metal halides. During an experiment, bromine water was added to a solution of potassium iodide. A record of the experiment is shown.


Experimental Record


Reactants Color  Color of Reactants.      Color of Reactants after Mixing

 Br2                  Light orange solution    Deep brown colored solution is formed

 KI                    Colorless solution 


Which of the following conclusions can be made about this chemical reaction based on the data?


Iodine is more reactive than bromine.

Potassium iodide and bromine do not react.

Potassium metal is formed from a single replacement reaction.

Iodine is deep brown in color and is formed from a single replacement reaction.

Top Answer

1.) A student wrote a chemical equation as shown. Fe 2 O 3 + 3H 2 Fe + H 2 O Magnesium is listed above zinc in the... View the full answer

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