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WorksheetsIntro to Chemical Reactions
Total questions: 20
Worksheet time: 18mins
Name
Class
Date
1.
indicates substance is a liquid
a)
g
b)
cr
c)
aq
d)
l
2.
An ending substance that is made during a chemical reaction is called
a)
Reactant
b)
Product
c)
Atom
d)
Molecule
3.
The starting substances of a chemical reaction is called
a)
products
b)
substances
c)
reactants
4.
What are Chemical Reactions?
a)
It's when you mix substances.
b)
a process in which atoms rearrange to form new substances
c)
When something bubbles.
d)
letter and numbers showing the types and number of atoms
5.
Describes the number of atoms in a compound of each element.
a)
coefficient
b)
superscript
c)
subscript
d)
SI unit
6.
Is Fe for iron an element or a compound?
a)
compound
b)
element
7.
Which are the products in the reaction shown?
a)
Al2O3
b)
Al
c)
O2
8.
CaCO3 represents a chemical
a)
Symbol
b)
Formula
c)
Subscript
d)
Reaction
9.
In the following equation, what are the products?
HCl + Zn → H2 + ZnCl2
HCl + Zn → H2 + ZnCl2
a)
HCl + Zn
b)
H2 + ZnCl2
c)
Zn → H2
d)
the stuff on the outside
10.
In this image, what are the information in red is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
11.
The symbol for a substance dissolved in water is
a)
(s)
b)
(l)
c)
(g)
d)
(aq)
12.
What is the arrow in a chemical equation...
H2 + O --> H2O
H2 + O --> H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
13.
In a ___________change, a substance changes into a different substance.
a)
Physical
b)
Chemical
14.
In a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what?
a)
Reactants
b)
Products
c)
Atoms
d)
Catalysts
15.
When a chemical reaction happens
a)
bonds must be broken and reformed
b)
chemicals don't collide
c)
atoms keep their arrangements
d)
chemicals keep their same properties
16.
A _________ describes a chemical reaction
a)
chemical equation
b)
chemical symbol
c)
chemical formula
d)
product
17.
What is a chemical reaction?
a)
produces or yields
b)
an attraction between atoms
c)
a process in which one or more substances rearrange to form a new one
d)
state that the identity stays the same before and after
18.
A chemical equation is a description of a reaction using symbols
a)
TRUE
b)
FALSE
19.
Atoms separate, rearrange, and new bonds form in a chemical reaction
a)
FALSE
b)
TRUE
20.
The arrow in a chemical equation separates two or more reactants
a)
FALSE
b)
TRUE
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