Free Printable Vocabulary : Chemical Reactions

1.

A combination of chemical symbols and numbers used to represent a substance

a)

Chemical reaction

b)

chemical formula

c)

chemical equation

d)

reaction

2.

A representation of a reaction that uses symbols to show the relationship between the starting substances and the ending substances in a reaction.

a)

Chemical reaction

b)

chemical formula

c)

chemical equation

d)

reaction

3.

A solid that is produced as a result of a reaction that takes place in a solution

a)

reactant

b)

product

c)

precipitate

d)

chemical reaction

4.

substance(s) that participate in a chemical reaction

a)

reactant

b)

product

c)

precipitate

d)

chemical reaction

5.

substance(s) that are formed in a chemical reaction

a)

reactant

b)

product

c)

precipitate

d)

chemical reaction

6.

A process in which one or more substances change to produce one or more different substances.

a)

chemical reaction

b)

chemical formula

c)

chemical equation

d)

chemical element

7.

A reaction in which as the bond between valence electrons is reformed, energy is absorbed from the surroundings and stored in the bonds being created.

a)

chemical reaction

b)

chemical formula

c)

exothermic reaction

d)

endothermic reaction

8.

A reaction in which as the bond between valence electrons is reformed, energy is released to the surroundings.

a)

chemical reaction

b)

chemical formula

c)

exothermic reaction

d)

endothermic reaction

9.

A number placed in front of a substance to indicate the quantity required for a balanced reaction to occur

a)

reactant

b)

product

c)

subscript

d)

coefficient

10.

Number to the lower right side of a symbol in a formula that represents the quantity of the element in that compound.

a)

reactant

b)

product

c)

subscript

d)

coefficient

11.

The blue arrows pointing to the blue "2s" represent

a)

coefficients

b)

subscripts

c)

products

d)

reactants

12.

The red arrows pointing to the red "2s" represent

a)

coefficients

b)

subscripts

c)

products

d)

reactants

13.

The image represents a

a)

Chemical reaction

b)

chemical formula

c)

chemical equation

d)

reaction

14.

The image represents a

a)

Chemical reaction

b)

chemical formula

c)

chemical equation

d)

reaction

15.

In the process of photosynthesis, the carbon dioxide and water represent the

a)

Chemical reaction

b)

reactants

c)

products

d)

reaction

16.

In the process of photosynthesis, as seen in the image, the glucose and oxygen represent the

a)

Chemical reaction

b)

reactants

c)

products

d)

reaction

17.

The images below represent the formation of a

a)

chemicals

b)

precipitate

c)

element

d)

cool experiment

18.

How many of each element are present in the following formula $3ZnCl_2$

a)

Zn = 6 and Cl =6

b)

Zn = 3 and Cl =5

c)

Zn = 5 and Cl =6

d)

Zn = 3 and Cl =6

19.

The image of the graph represents an

a)

endothermic reaction because the reactants have more energy than the products.

b)

exothermic reaction because the reactants have more energy than the products.

c)

endothermic reaction because the reactants have less energy than the products.

d)

exothermic reaction because the reactants have less energy than the products.

20.

The image of the graph represents an

a)

endothermic reaction because the reactants have more energy than the products.

b)

exothermic reaction because the reactants have more energy than the products.

c)

exothermic reaction because the reactants have less energy than the products.

d)

endothermic reaction because the reactants have less energy than the products.

21.

$3ZnCl_{2\ }\ \ +\ Al_2O_{3\ \ }\rightarrow\ \ 3\ ZnO\ \ +\ 2AlCl_3$

Look at the chemical reaction below. How many Aluminum and Chlorine atoms are found on the product side of the equation.

a)

Al = 2, Cl = 3

b)

Al = 2 , Cl = 6

c)

Al = 5, Cl =3

d)

Al = 5; Cl = 2

e)

Al = 2, Cl = 5

22.

How many Cu atoms are present in the formula $3Cu\left(NO_3\right)_2$

a)

1

b)

2

c)

3

d)

5

e)

6

23.

How many N atoms are present in the formula $3Cu\left(NO_3\right)_2$

a)

2

b)

4

c)

5

d)

6

e)

18

24.

How many O atoms are present in the formula $3Cu\left(NO_3\right)_2$

a)

3

b)

6

c)

9

d)

12

e)

18

25.

Students added baking soda to room temperature buttermilk when making pancakes. They immediately noticed bubbles and upon picking up the measuring cup noted that it was colder to the touch. Being smart OJHS students they knew it was a(n)

a)

endothermic reaction.

b)

exothermic reaction.

c)

tasty reaction.

26.

Chemical hand warmer packets used when snowboarding are an example of an

a)

endothermic reaction.

b)

exothermic reaction.

27.

How many K are in the following formula $2KClO_3$

a)

1

b)

2

c)

3

d)

5

e)

6

28.

How many Cl are in the following formula $2KClO_3$

a)

1

b)

2

c)

3

d)

5

e)

6

29.

How many O are in the following formula $2KClO_3$

a)

1

b)

2

c)

3

d)

5

e)

6

30.

Which of the following are clues that a chemical reaction has occurred? ( choose all that apply)

a)

change in size

b)

formation of a precipitate

c)

gas formation

d)

change in temperature (up or down)

e)

phase change

Vocabulary : Chemical Reactions

Total questions: 30

Worksheet time: 23mins

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