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WorksheetsChemical Reactions Study Guide
Total questions: 15
Worksheet time: 32mins
Name
Class
Date
1.
A copper penny turning greenish after a few years is an example of...
a)
Chemical Change
b)
Physical Change
2.
In a chemical equation, the substances that are on the right side of the arrow are the...
a)
reactants
b)
products
c)
catalysts
d)
inhibitors
3.
The substances on the left side of the arrow are...
a)
products
b)
reactants
c)
inhibitors
d)
catalysts
4.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
chemical formulas
d)
compounds
5.
what is the name for the solid formed during a reaction?
a)
Precipitate
b)
Gas
c)
bubbles
d)
aqueous
6.
2 NaBr + 1 Ca(OH)2 ----> 1 CaBr2 + 2 NaOH
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
7.
2 NH3+ 1 H2SO4 ----> 1 (NH4)2SO4
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
8.
2 NO2 ----> 2 O2 + N2
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
9.
Which statement is not a description of a chemical reaction?
a)
A solid is dropped into a beaker of liquid and a gas is released.
b)
Two liquids are mixed in a beaker and a solid forms at the bottom of the beaker.
c)
A solid is dropped into a beaker of liquid and an explosion occurs.
d)
A liquid is heated in the sun and half of it evaporates.
10.
Which of the following is NOT a sign of a chemical reaction?
a)
Color changes
b)
Cutting into fourths
c)
Light is produced
d)
Gas is formed
11.
Which of the following is evidence of a chemical reaction?
a)
fizzing
b)
water changing to ice
c)
saltwater
d)
paper being cut in half
12.
A teacher is demonstrating physical and chemical changes to her class. Which action should she use to demonstrate a chemical change?
a)
cutting a piece of paper
b)
folding a piece of paper
c)
tearing a piece of paper
d)
burning a piece of paper
13.
Which of the following is a common sign that a chemical change has occurred?
a)
A chemical has turned a different color, bubbled, and/or changed temperature.
b)
A chemical has changed to a different state of matter, such as a liquid to a solid.
c)
A chemical has changed size.
d)
A chemical has become a different shape.
14.
In which of the following examples has a chemical reaction occurred?
a)
After putting liquid batter into a hot pan, the batter solidifies and begins to turn brown.
b)
After turning on a blender filled with fruits, the fruit is chopped up and mixed together.
c)
After taking a tray filled with ice cubes out of the freezer, the cubes begin to melt.
d)
After adding a spoonful of sugar to a mug of hot coffee, the sugar dissolves completely.
15.
WHY is burning a campfire a chemical change?
a)
It created a new substance with new properties
b)
It changes in size
c)
There is a lot of smoke
d)
The logs get smaller
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