Free Printable Review

1.

$C_2H_6\ +\ 5O_2\ \rightarrow\ 2CO_2\ +\ 3H_2O_2$
Given this chemical equation, what are the REACTANTS?

a)

$C_2H_{6\ }and\ 5O_2$

b)

$2CO_2\ and\ 3H_2O_2$

2.

Balance the following equation:

___ H₂+ ___ O₂→___ H₂O

a)

1, 1, 3

b)

2, 2, 2

c)

1, 2, 1

d)

2,1, 2

3.

What coefficient should go in the blank space to balance the chemical equation?
2Al +____ HCl → 2AlCl₃ + 3H2

a)

2

b)

4

c)

3

d)

6

4.

Mg + ___ HCl → MgCl₂ + H₂

a)

1

b)

2

c)

3

d)

4

5.

Balance this equation.
_CF₄+ _Br₂-- _CBr₄+ _F₂

a)

2,1,2,1

b)

1,2,2,1

c)

1,2,1,2

d)

2,2,2,2

6.

Balance this equation.
_SnO₂+_H₂-->_Sn +_H₂O

a)

1,1,2,1

b)

1,2,1,1

c)

1,2,1,2

d)

1,2,2,1

7.

One compound and a free element that recombine to yield a new compound and a new free element

a)

combustion

b)

synthesis

c)

decomposition

d)

single replacement

8.

Breaks down compounds into simpler products. Starts with one reactant and ends with 2 or more products

a)

decomposition

b)

synthesis

c)

combustion

d)

single replacement

9.

When two or more substances combine to form a more complex substance

a)

compound

b)

double replacement

c)

synthesis

d)

catalyst

10.

The total mass of the reactants must equal the total mass of products. Matter is never created or destroyed

a)

Conservation of Mass

b)

Pascal's Principle

c)

catalyst

d)

inhibitor

11.

Reactions that have hydrocarbons (CH₄) and oxygen as reactants and carbon dioxide and water as products

a)

Conservation of Mass

b)

combustion

c)

double replacement

d)

decomposition

12.

Which type of chemical reaction is this:

3Fe + 4H₂O -------- Fe₃O₄ + 4H₂

a)

synthesis

b)

single replacement

c)

decomposition

d)

double replacement

13.

Which type of chemical reaction is this:

FeCl₂ + K₂S --------- FeS + 2KCl

a)

synthesis

b)

double replacement

c)

combustion

d)

single replacement

14.

Which type of chemical reaction is this:

C₂H₄+ 3O₂-------- 2CO₂ + 2H₂O

a)

double replacement

b)

decomposition

c)

combustion

d)

synthesis

15.

Which type of chemical reaction is this:

HgO ------- Hg + O

a)

synthesis

b)

double replacement

c)

combustion

d)

decomposition

Review

Total questions: 15

Worksheet time: 19mins

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