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Indls Chemistry

Total questions: 22

Worksheet time: 15mins

Name
Class
Date
1.

Chemical or Physical:

A characteristic of matter that can be observed with your 5 senses is a ____________ property.

a)

Chemical

b)

Physical

2.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
3.

Is melting butter for popcorn a chemical or physical change?

a)

chemical

b)

physical

4.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
rust
5.

Change in color is a physical change.

a)

True

b)

False

6.

Chemical Reaction

a)

a substance formed as a result of a chemical reaction

b)

a change in matter that produces one or more new substances

c)

the process in which substances undergo chemical changes that result in the formation of new substances

d)

a substance that enters into a chemical reaction

7.

Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe

a)

yes

b)

no

8.

Balance this equation

_Al +_HCl --> _H2 +_AlCl3

a)

2,6,3,2

b)

it's already balanced

c)

4,12,3,4

d)

2,1,4,5

9.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
10.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
11.

What is the total number of protons, electrons and neutrons in oxygen, O, atom that has the mass number of 16?

a)

8

b)

16

c)

24

d)

31

12.
the starting materials in a chemical reaction
a)
Products
b)
Reactants
c)
Starters
d)
Enders
13.

How many molecules are in this formula?

a)

1

b)

2

c)

3

d)

6

14.

How many neutrons are in an Calcium atom?

a)

20

b)

40.08

c)

60

15.
Which subatomic particles contribute the most to the mass of an atom?
a)
Protons, Neutrons, Electrons
b)
Protons only
c)
Protons and Electrons
d)
Protons and Neutrons
16.

When you change from liquid to a solid it is called..

a)

Freezing

b)

Melting

c)

Evaporation

d)

Condensation

17.
Volume is the amount of space an object takes up.
a)
True
b)
False
18.
The atomic number of Sulfur is:
a)
32.06
b)
16
c)
32
19.
Endothermic reactions: Heat is absorbed
a)
True
b)
False
20.
Exothermic reactions: heat is given off
a)
True
b)
False
21.
Which of the following is demonstrating sublimation?
a)
H2O(s) → H2O(l)
b)
H2O(l) → H2O(g)
c)
H2O(s) → H2O(g)
d)
H2O(g) → H2O(s)
22.
During an endothermic reaction, heat content in  the surroundings decreases because 
a)
all reactions need  heat energy 
b)
the reaction absorbs  heat energy
c)
energy is given off by the reaction
d)
heat energy is  destroyed during  reactions

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