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Unit 1 Test Review: Intro to Chemical Reactions

Total questions: 25

Worksheet time: 28mins

Name
Class
Date
1.
What is the volume of the liquid in this graduated cylinder?
a)
19 mL 
b)
35 mL 
c)
24 mL 
d)
1.9 mL
2.

What is the name of these objects?

a)

metric ruler

b)

Celsius thermometer

c)

graduated cylinders

d)

pan balances

3.

If there is an accident, injury, or close call, who should you tell immediately?

a)

your teacher

b)

your parents

c)

your lab partner

d)

no one

4.
You have left over chemicals after you complete the lab
a)
Follow all instructions given for disposal of chemicals
b)
Place liquids down the drain and solids in the trash
c)
Put left over chemicals back into their original containers
d)
Leave all the chemicals on the lab counter
5.

What is this?

a)

metric ruler

b)

Celsius thermometer

c)

graduated cylinders

d)

pan balances

6.
Evidence of a chemical reactions is anything that shows - 
a)
a new substance has formed
b)
a solid dissolved in a liquid
c)
interaction between 2 gases
d)
a change in the state of matter
7.

All of the following are indicators of a chemical reaction except one. Which one is NOT an indicator that a chemical reaction has taken place?

a)

the production of heat or light

b)

a color change

c)

the production of gas bubbles

d)

the dissolving of one substance in another

8.

chemical change or physical change?

a)

chemical change

b)

physical change

9.

A student places a piece of a potato into a container of hydrogen peroxide and observes bubbles forming around the potato. The presence of bubbles might indicate the formation of a new substance because bubbles -

a)

could show that a gas is forming

b)

always rise to the top of a liquid.

c)

are almost always perfectly spherical.

d)

usually burst after a few minutes.

10.
Is Fe for iron an element or a compound?
a)
compound
b)
element
11.
Which are the products in the reaction shown?
a)
Al2O3
b)
Al
c)
O2
12.
In the following equation, what are the products?
HCl + Zn → H2 + ZnCl2
a)
HCl + Zn
b)
H2 + ZnCl2
c)
Zn → H2
d)
the stuff on the outside
13.
In this image, what are the information in red is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
14.
Is Fe2O3 an element or a compound?
a)
compound
b)
element
15.

When two clear liquids were combined, a precipitate formed. This most likely means that:

a)

A chemical reaction took place.

b)

The two substances have low boiling points.

c)

One substance dissolved in the other.

d)

The two substances are non-reactive.

16.

Before a chemical reaction, the total mass of two reactants is measured to be 65 grams. After the reaction, what should be the total mass of the products?

a)

0 grams

b)

25 grams

c)

45 grams

d)

65 grams

17.

Is this equation balanced?

N2 + 3H2 → 2NH3

a)

Yes - it is balanced

b)

No - it is not balanced

18.

Is this equation balanced?

Mg + O2 → MgO

a)

Yes - it is balanced

b)

No - it is not balanced

19.
In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 
a)
4g
b)
5g
c)
9g
d)
14g
20.
In the reaction AB-----> A + B reactant AB has 12g and product B has 5g. How many grams should product A have?
a)
17g
b)
2g
c)
7g
d)
None of the above
21.

Identify the reaction type:

C2H6 + O2 --> CO2 + H2O

a)

Double replacement

b)

Synthesis

c)

Acid base

d)

Combustion

22.

Identify the reaction type for the following equation:

K + F2 --> KF

a)

Double replacement

b)

Single Replacement

c)

Synthesis

d)

Decomposition

23.

Identify the type of reaction:

ZnCl2 + Mg --> Zn + MgCl2

a)

Precipitate

b)

Single Replacement

c)

Double Replacement

d)

Decomposition

24.

Identify the reaction type:

NaCl + KOH --> KCl + NaOH

a)

Double replacement

b)

Combustion

c)

Synthesis

d)

Decomposition

25.

Identify the reaction type:

H2O2 --> H2O + O2

a)

Decomposition

b)

Synthesis

c)

Combustion

d)

Acid Base

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